D I S C O V E R    L I F E   
Bee Hunt! Odonata Lepidoptera 
  HomeAll Living ThingsIDnature guidesGlobal mapperAlbumsLabelsSearch
  AboutNewsEventsResearchEducationProjectsStudy sitesHelp


Megachile oenotherae (Mitchell, 1924)
Megachiloides oenotherae Mitchell, 1924

Life   Insecta   Hymenoptera   Apoidea   Megachilidae   Megachile
Subgenus: Megachiloides

Links
Overview
Notes: Female with only 3 teeth, but at least in some specimens there can be a very very tiny tooth on the side of the second tooth, near the cutting edge.Hairs on sternites noticably longer than most species except S6 which is abruptly short haired and and nearly jet black...more densely haired than other species. Tongue suppppppperrrrr long extending almost to end of abdomen. Male. The prominent projecting plate off of T6 is convex unlike almost all other Megachile species, appears almost like a cowling. Rim of T6 deeply and broadly concave with a projecting rounded lobe at each end. S6 triangular in the center and pointed, visible from above because of the concave part of T6.
Reprinted with permission from: Mitchell, T.B. 1962 Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 152.


FEMALE�Length 11 mm.; entirely black, including tegulae and legs, tibial spurs yellow;eyes subparallel; clypeal margin about straight, with a very shallow, emarginate area on each extreme side; mandibles 3-dentate, a long bevelled edge between the 2nd and 3rd teeth (fig. 47); glossa extremely long, reaching nearly to tip of abdomen, and 2nd segment of labial palpi about four times length of the 1st; lateral ocelli very slightly nearer margin of vertex than to each other; cheeks very slightly broader than eyes; vertex somewhat shining, punctures quite deep and distinct, rather fine and close between ocelli medially, becoming slightly more coarse and distant on each side, close on cheeks, rather fine above, somewhat coarser below; face with some shining spaces just below anterior ocellus, but otherwise very finely and closely punctate, supraclypeal area somewhat more coarsely and densely so, punctures quite uniformly close and deep on clypeus; pubescence of face below ocelli rather c&pious, white, that on cheeks white and rather thin above, becoming somewhat longer below, black between ocelli and across vertex; pubescence whitish, rather copious on thorax laterally and posteriorly, but largely black on scutum, hairs erect, quite copious, becoming pale at extreme sides and across anterior margin, scutellum with a few, black hairs interspersed through the generally pale, erect pubescence; scutum and scutellum quite closely, deeply and distinctly punctate, punctures slightly separated medially, becoming crowded between notaulices and tegulae and on scutellum laterally, axillae very finely and densely punctate; punctures of pleura rather coarse, quite close but shallow below, becoming somewhat finer above; lateral faces of propodeum rather smooth but dull, posterior face with rather close but very minute and vague punctures; all basitarsi distinctly shorter and narrower than their tibiae; tegulae minutely and closely punctate; wings subhyaline, veins piceous; abdominal terga 2-5 rather shallowly grooved or depressed across base, basal margin of these subcarinate, apical margins of terga quite deeply depressed laterally, less so medially on the more basal terga, densely white fasciate, these very narrow medially on 2 and 3, but complete on all; tergum 1 with copious, long and erect, whitish pubescence, discal pubescence of 2 pale, rather long and erect in large part, with a few black hairs laterally, that of 3-6 black, rather short but quite dense and erect; punctures very fine and close on terga 1 and 2, slightly coarser and more distinctly separated on 3-5, 6 very slightly concave in profile, with abundant, erect, black pubescence visible, a few pale, appressed hairs toward tip, punctures very fine and close throughout; sternum 6 well covered with rather short, black, scopal hairs, with a dense fringe of very short, dark hairs along apical margin; scopa otherwise very pale yellowish or whitish; punctures of sternum 2 quite fine and close, becoming somewhat more coarse and sparse on 3-5, apical margins depressed and obscurely hyaline, sternal fasciae absent.

MALE�Length 9 mm.; black, including legs in large part, tegulae somewhat more brownish, spurs pale yellow; eyes subparallel; clypeal margin straight beneath the dense beard; mandibles 3-dentate, with a rather slender, sharply acute, basal inferior process; glossa extremely long, reaching nearly to tip of abdomen, 2nd segment of labial palpus fully four times the length of segment 1; apical segment of flagellum slender; lateral ocelli very slightly nearer margin of vertex than to eyes; cheeks subequal to eyes in width, obscurely angulate below; vertex somewhat shining, punctures deep and distinct, quite uniformly and slightly separated, becoming somewhat finer and closer on cheeks below, some shining spaces just below anterior ocellus, face otherwise very finely and closely punctate throughout; pubescence white, quite elongate and copious on face, clypeus and lower half of cheeks, elongate and erect but rather thin on vertex and cheeks above, largely pale, with scattered, somewhat shorter, black hairs intermixed; pubescence white and quite copious on thorax laterally and posteriorly, scutum with a transverse patch of fuscous pubescence over posterior half, more distinctly whitish anteriorly, scutellum with a few, fuscous hairs intermixed with the generally white, erect pubescence; punctures of scutum quite deep and distinct, close in general, slightly separated only in center, and slightly separated in mid-line of scutellum but quite finely and closely punctate on each side, punctures of axillae very fine and densely crowded; pleura rather dull, punctures shallow but close, slightly coarser below, fine and densely crowded above; lateral faces of propodeum smooth but dull, posterior face with rather close, minute and somewhat vague punctures; front basitarsus slightly dilated, nearly equalling its tibia in width, and shallowly excavated anteriorly, following segments more or less testaceous, posterior fringe dense and white but rather short; front femur quite broadly dilated medially, lower margin strongly bowed and subcarinate, entirely piceous; front coxal spines slender and elongate, subacute apically, coxae largely bare but each with a small patch of inconspicuous pale bristles at base of spine; mid tibial spurs well developed, mid tarsi with a rather thin but elongate posterior fringe, basitarsi quite narrow and short relative to the tibiae; tegulae minutely and closely punctate; wings subhyaline, veins, brownishpiceous; abdominal terga 2-5 slightly depressed across base, basal margin of depression subcarinate, apical margins of terga rather deeplybut narrowly depressed laterally, these not evident medially on the more basal terga, but complete and deeper on the more apical terga, quite densely white fasciate, especially laterally; discal pubescence of terga 1 and 2 quite copious and elongate, entirely white, tergum 3 with a few, black hairs toward apical margin but pale basally, largely black, erect and rather copious on 4 and 5; punctures of terga 1 and 2 very fine and uniformly close, becoming somewhat more distinctly separated on 3 and 4, rather irregular and substriate on 5, carina of 6 subtriangular in outline, entire medially, margin with a few irregularities on each side, the carina slightly downcurved at tip, median teeth of apical margin broadly and conspicously carinate, subequally distant from each other and the obscure, lateral angles which are not definitely dentate; tergum 7 triangularly acute; sterna 1-4 exposed, very finely and rather closely punctate, punctures becoming sparse apically on 3 and 4, apical margins narrowly depressed and hyaline, rather thinly long pubescent; sternum 5 with rather extensive, distinctly delimited, apical, pubescence plates on each side, setose area rather broad and short, separated from basal margin by a membraneous area, partially divided medially and well covered with robust, apically dilated setae (fig. 46); sternum 6 with small, well separated, setose areas, setae flexed apically, apical lobe quite expansive, broader than long, lateral angles slightly produced; gonocoxites narrowed above base, robust apically, slightly sinuate, obliquely compressed, slightly dilated and short setose apically (fig. 55).

DISTRIBUTION�New Jersey to Texas and Oklahoma, May and June.

FLOWER RECORDS�This collects pollen from Oenothera laciniata, but has also been collected visiting Ceano thus meriolex and Pent stemon.

Identification
Extracted from: Mitchell, T. B. 1980. A Generic Revision of the Megachiline Bees of the Western Hemisphere (Hymenoptera: Megachilidae). North Carolina State University. 1-93.

FEMALE

HEAD:1. Ratio of median length (clypeal mar-gin to median ocellus) to maximum width (be-tween outer margins of eyes) - 29:46. 2. Eyes - Length, 29; lateral width, 10; ratio of upper, to maximum, to lower inter¬spaces - 27:30:26. Very slightly convergent below (A-2); inner margins straight (B-l). 3. Clypeus - Median length, 11; basal width, 12; apical width, 24. Surface strongly convex (A-3); apical margin slightly outcurv-ed (B-2); apical margin simple (C-l); length slightly exceeded by basal width (D-3); api-cal width twice the basal width (E-l); sur¬face closely and finely punctate. 4. Supraclypeal area - Surface rather strongly convex (A-3); median length much less than that of clypeus (7:11) (B-l). 5. Parocular areas - Surface below level of antennae slightly concave (A-3); maximum wid-th two-thirds basal width of clypeus (B-3); carina distinct, only slightly separated from eye by a narrow groove. 6. Subocellar area - Surface flat (A-l); punctures separated but close, on a shining field (B-2). 7. Antennal sockets - Distance to clypeus, 5; to eye, 6; to median ocellus, 11; and to each other, 10. Slightly nearer clypeus than to eyes (A-3); nearer eyes than to each other (B-2); much nearer eyes than to median ocel-lus (C-2); much nearer clypeus than to each other (D-2); much nearer clypeus than to med-ian ocellus (E-2); and approximately equidis-tant from median ocellus and each other (F-l) 8. Antennae - Relative lengths of scape,10; pedicel, 2.5; flagellar segment one,2.5; two, 2.0; six, 2.5; and ten, 5; breadth ofisix,2. Median segments very slightly longer than their breadth (A-2); apical segment only half the length of scape (B-l). 9. Vertex - Surface broadly, transversely convex (A-l), ocellar triangle not at all el-evated; occipital margin quite strongly in¬curved (B-2), and not carinate (C-2); punc-tures irregularly distributed, but deep and distinct. 10. Lateral ocelli - Distance to eye, 8; to occipital margin, 7; to each other, 7.Slight- ly nearer occipital margin than to eye (A-2); equidistant from occipital margin and each other (B-l); and slightly nearer each other than to eyes (C-2). 11. Genae - Maximum width, 9; width of eye in lateral view, 10; slightly exceeded by that of eye (A-2); somewhat narrowed above and below (B-3); occipital margin not carin¬ate (C-2), and not protuberant below (D-2); hypostomal area flattened and only normally pubescent (E-l). 12. Labrum - Median length,13;basal width, 12; apical width, 10; Basal width nearly equal to median length (A-l); apical width slightly exceeded by median length (B-2). 13. Mandibles - Short, broad apically, den-tate apical margin about equal to upper mar-gin (A-l); apical margin with only one well-formed tooth between the apical and inner angles or teeth, the location of the usual third tooth occupied by a very small angle (B-2); bevelled cutting edge in third inter¬space only (D-2); submarginal groove dis¬tinct, extending from second tooth to inner angle; inferior submarginal line nearly straight, with a quite dense fringe of more elongate hairs; without basal processes (C-4). 14. Labial palpi - Segment one,12; two,45. Segment one much shorter than segment two (A-2). MESOSOMA:15. Scutum - Median length, 30; breadth at tegulae, 35. Surface evenly convex (A-l); punctate, with setiferous pits (B-3); punctures close and fine (C-5); median line distinct but fine (D-2); parapsidal lines visible only as faint grooves (E-l). 16. Pronotal lobe - Transverse ridge low and obscure (A-l). 17. Mesepisterna - Surface finely and clos-ely punctate (A-l). 18. Scutellum - Median length, 10; basal breadth, 12. Posterior margin broadly rounded (A-2); strongly convex at mid line, and thus discontinuous with slope of scutum (B-2); surface finely and closely punctate (C-l). 19. Axillae - Surface more finely punctate than that of scutellum (A-2). 20. Metanotum - Lateral extensions poster¬ior to base of hind wing not depressed be¬neath scutellar crest (A-4). 21. Metepisterna - Unmodified. 22. Propodeal triangle - Inferior margin nearly horizontal laterally (A-2); apex ob¬tuse (B-2); median length approximately equal (or subequal) to length of median groove be¬low (C-l). 23. Fore wings - Total length, 90; radial cell, 24. Recurrent veins subequally distant from base and apex of second submarginal cell (A-l); subhyaline in color (B-2); veins fus-cous to ferruginous (C-3). 24 - Tegulae - Minutely and closely punc¬tate (A-l); black or piceous (B-l). 25. Fore legs - Normal (A-1); tarsal claws without basal teeth (B-2). 26.Hid legs - Coxae, trochanters, femora and tibiae normal (A-1); latero-apical angles of basitarsi, and of tarsi 2 and 3, more or less produced, anterior process more elongate than posterior angle (B-l and C-l). 27. Hind legs - Coxae, trochanters, femora and tibiae normal (A-1); basitarsi two-thirds length of their tibiae (B-4) and only slight¬ ly more than half their width, 6:10; surface quite flat (C-l); margins slightly convergent apically (D-2) Relative lengths (L) of tibiae, basitarsi, tarsi 2-5, and tibial spurs; and breadths (B) of tibiae and basitarsi. 28. Basal tergum - Margin of concavity dis¬ tinct, but only subcarinate (A-2); concavity chiefly smooth and shining, punctate only toward midline and base (B-l); vertical fold slightly sulcate (C-2); postgradular area short and flat at midline, becoming broad laterally, forming the ventro-lateral areas beneath (D-l). 29-32. Terga 2-5 - Graduli complete and somewhat elevated above level of postgradu¬lar groove (A-1); pregradular areas normally covered by the preceding terga (B-l); pre¬gradular punctures narrowly close and fine along gradulus, otherwise impunctate or hid¬den (C-l); midline of postgradular areas con¬vex between basal groove and apical rim (D-2) postgradular punctures very close and fine (F-l); apical rims narrowly depressed,slight¬ly so medially, more deeply so laterally; apical fasciae narrow but entire, confined to the narrow rim; discal pubescence short but erect, visible in profile; fasciae white, dis¬cal pubescence, black. 33. Tergum 6 - Basal width much greater than median length (A-2); very slightly con-concave toward apex (B-2); punctures uniform-? ly fine and close. 34. Basal sternum - Surface more limited, lateral margins more nearly parallel, and mar¬gins of ventro-lateral areas of basal tergum less divergent, appearing to cover a greater area of the sternum (A-1); punctures very fine and close (B-l); apical rim narrowly but ab¬ruptly declivous medially (C-l). 35. Sternum 2 - Basal margin deeply in¬curved, nearly reaching gradulus medially (A-1); gradulus linear and subcarinate (B-l); pregradular areas laterally nearly impunctate, with only a few scattered punctures (C-l); postgradular area very finely and closely punctate (D-l), covered in large part by fine, elongate, simple scopal hairs (E-l). 36-38. Sterna 3-5 - Graduli linear, not at all carinate (A-2); pregradular areas cover¬ed by the preceding sterna (B-l); postgradu¬lar areas uniformly closely and finely punctate (C-2); uniformly covered by elon¬gate, simple, scopal hairs (D-l); apical margins narrowly smooth and shining (E-l), and not fasciate (F-l). 39. Sternum 6 - Surface nearly flat (A-1); closely punctate and well covered with scop¬al hairs (B-l); apical margin broadly round¬ed (C-l); apex with a dense fringe of very short setae (D-l), without a bare lip.

MALE

HEAD: 41. Ratio of median length of face to maximum width - 24:45. 42. Eyes - Length, 29; lateral width, 8; ratio of upper, to maximum, to lower inter¬spaces - 27:29:24. Inner margins parallel (A-1); and straight (B-l). 43. Clypeus - Median length,7; basal width, 12; apical margin, 22. A: Surface slightly convex (A-2); apical margin about straight (E-l) and simple (C-l); and median length exceeded by basal width (D-3). 44. Supraclypeal area - Surface flat (A-1); median length exceeded by that of clypeus (B-l). 45. Parocular areas - Surface below level of antennae flat (A-1); maximum width about two-thirds basal width of clypeus (B-3); carina distinct, only slightly separated from eye.
46. Subocellar area - Surface flat (A-1); well punctured, the pits only slightly separ¬ated (B-2); median groove inevident (C-3). 47. Antennal sockets - Distance to clypeus, 5; to eye, 6; to median ocellus, 10; and to each other, 9. Slightly nearer clypeus than to eyes (A-3); nearer eyes than to each other (B-2); nearer eyes than to median ocellus (C-2); much nearer clypeus than to each other (D-2); much nearer clypeus than to median o-cellue (E-2); and slightly nearer each other than to median ocellus (F-2). 48. Antennae - Relative lengths of scape,7; pedicel, 2.5;flagellar segment one, 2.5; two, 2.5; six, 3; eleven, 5; breadth of six, 2. Median flagellar segments slightly longer longer than their breadth (A-2); apical seg¬ment distinctly shorter than scape (B-l). 49. Vertex - Surface broadly, transversely convex (A-1); occipital margin strongly in¬curved (B-2); margin not carinate (C-2). 50. Lateral ocelli - Distance to eye, 8; to occipital margin, 8; to each other, 7. Ocelli equidistant from eyes and occipital margin (A-l); nearer each other than to oc¬cipital margin (B-3); and nearer each other than to eyes (C-2). 51. Genae - Maximum width slightly greater than that of eyes, in lateral view (A-3); slightly narrowed above (B-2); and copiously long pubescent below (C-4). 52. Labrum - Median length, 18; basal width 15; apical width, 10. Basal width slightly exceeded by median length (A-3); apical width much exceeded by median length (B-3); and apical width exceeded by basal width (C-1). 53. Mandibles - Distinctly 3-dentate (A-l); inferior process sub-basal, small and acute (B-8). 54. Labial palpi - Segment one,10; two,35. Segment two elongate, three or more times the length of segment one (A-2). MESOSOMA: 55. Scutum - Median length, 30; breadth at tegulae, 32. Surface evenly con¬vex (A-l); punctate, with setiferous pits (B-3); punctures close and fine (C-5); median line distinct, but fine (D-l); parapsidal lines slightly elevated (E-2). 56. Pronotal lobe - Transverse ridge low and obscure (A-l). 57. Mesepisterna - Surface very finely and closely punctate (A-l); without ventral spines or tubercles anterior to mid coxae (B-2). 58. Scutellum - Median length, 10; basal breadth, 8. Posterior margin nearly straight (A-l); strongly convex in profile (B-2); finely and closely punctate except along mid¬line (C-1). 59. Axillae - Surface more finely and clos¬ely punctate than scutellum (A-2). 60. Metanotum - Lateral extensions posteri¬or to base of hind wing not depressed beneath scutellar crest (A-4). 61. Metepi8terna - Unmodified. 62. Propodeal triangle - Inferior margin nearly horizontal laterally (A-2); apex ob¬tuse (B-2); median length somewhat longer than median groove below (C-2). 63. Fore wings - Radial cell, 22; total length, 83. Recurrent veins subequally dis¬tant from base and apex of second submargin¬al cell (A-l); subhyaline (B-2); veins brown¬ish (C-2). 64. Tegulae - Smooth and shining, in part (A-2); dark ferruginous (B-2). 65. Front coxae - Broadly convex (A-l); surface shining, punctures minute and sparse (B-4); spines elongate and erect (C-3); a stuall patch of short, testaceous bristles present (D-2); outer margin fringed with white hairs (E-2); dark ferruginous (F-2). 66. Mid coxae - Unmodified (A-l). 67. Hind coxae - Unmodified (A-l). 68. Trochanters - Front pair not produced (A-2); longer than apical width (B-2); dark ferruginous (E-2); hind pair broader at base than their length (F-l); dark ferruginous (G-2). 69. Front femora - Outer and inner surfaces expanded, lower margin broadly down-curved (A-3); outer face more piceous, upper and in¬ner faces more ferruginous (B-5). 70. Mid femora - Anterior surface more con¬vex, smooth and shining, nearly impunctate (A-l); posterior surface to some degree con¬vex (B-2); dark ferruginous (C-2). 71. Hind femora - Unmodified (A-l). 72. Front tibiae - Outer face nearly paral-lel-sided, apex only slightly broader than base (A-l); anterior and posterior faces slightly broader apically than outer face (B-l); outer face black, otherwise dark fer¬ruginous (C-2). 73. Mid tibiae - Outer face nearly paral¬lel-sided (A-l); apex normal, with a well developed, apical spur (B-l); ventral ridge normal, spur located at its apex (C-1). 74. Hind tibiae - Normal. 75. Front tarsi - Basitarsi dilated, much longer than segment 2, and quite deeply ex¬cavated along anterior margin (A-3); tarsi 2-4 slightly dilated apically, but not ex¬cavated (B-2); apical segment unmodified (C-1); posterior fringe white, dense and conspicuous hairs considerably longer than breadth of the segments (D-2). 76. Mid tarsi - Basitarsi parallel-sided (A-l); tarsi 2-4 cordate, apical breadth of each segment about equal to median length (B-l); tarsus 5 unmodified (C-1); posterior fringe well formed, hairs of basitarsus exceeding the length of the segment (D-2). 77. Hind tarsi - Apex of basitarsi only slightly narrower than base (A-2); tarsi 2-4 longer than the apical breadth of each seg¬ment (B-2); tarsus 5 slender and elongate (C-1). Relative lengths (L) of tibiae, basitarsi, tarsi 2-5 and tibial spurs; and breadths (B) of tibiae and basitarsi. 78. Basal tergum - Margin of concavity dis¬tinct, but only subcarinate (A-2); concavity chiefly smooth and shining, punctate only tow¬ard midline and base (B-l); vertical fold slightly sulcate


Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Onagraceae  Oenothera sp @ BBSL (1)

Oenothera @ UCRC_ENT (5)

go to Discover Life's Facebook group

Updated: 2021-06-15 07:59:57 gmt
Discover Life | Top
© Designed by The Polistes Corporation