Smithsonian Institution, Entomology Department · 9
Megachile bahamensis, male, face |
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Smithsonian Institution, Entomology Department · 9
Megachile bahamensis, male, side |
Smithsonian Institution, Entomology Department · 9
Megachile bahamensis, male, top |
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Smithsonian Institution, Entomology Department · 9
Megachile bahamensis, male, wing |
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Overview |
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 13 mm.; entirely black, including tegulae and legs, mid and hind spurs brownish; eyes slightly convergent below; clypeal margin nearly straight; mandibles 5- dentate, a long bevelled edge between 2nd and 3rd teeth; lateral ocelli subequally distant from eyes and margin of vertex; cheeks slightly narrower than eyes; vertex shining, with scattered, very sparse, shallow and rather coarse punctures, and a few exceedingly minute, hardly visible punctures between, area between and behind lateral ocelli nearly to margin of vertex impunctate, and area between eyes and ocelli with only exceedingly minute punctures; cheeks above with rather coarse and close punctures, becoming almost rugose below; face below anterior ocellus somewhat shining, punctures rather variable and well separated but quite deep and distinct, becoming more finely rugoso-punctate laterally; supraclypeal area shining, with only a few, scattered, rather coarse punctures, clypeus shining, punctures rather coarse but slightly separated medially, becoming rather close at extreme sides; pubescence over entire head and thorax deep fuscous to black, rather dense around antennae, on sides of face and a transverse brush above anterior ocellus, quite dense and elongate on cheeks below, becoming shorter above; pubescence quite dense on thorax laterally and posteriorly, the scutum and scutellum very sparsely short pubescent; scutum and scutellum shining, punctures fine, quite sparse over the broad median area of scutum, more narrowly so on scutellum, punctures becoming rather close laterally, fine and slightly separated on axillae, those on scutellum of two rather distinct sizes; pleura dull, quite closely and rather finely punctate, lateral faces of propodeum dull, rather shallowly rugoso-punctate, posterior face very finely and closely punctate; all basitarsi subequal in breadth to their tibiae and only slightly shorter; tegulae with minute rather close and barely visible punctures; front wings quite deeply infuscated or brownish, veins brownish-piceous; basal depressions of abdominal terga barely evident, basal margin of 2 and 3 subcarinate, very finely and quite sparsely punctate medially, apical margins depressed only
extreme sides, and area just anterior to these depressions very sparsely punctate and shining, punctures rather close and deep in the depressed margin; basal tergum with rather elongate, copious, fuscous pubescence, discal pubescence of following terga very sparse, suberect, short and entirely fuscous
black; tergum 6 about straight in profile with no erect hairs visible, but with a few erect, black hairs laterally in dorsal view, punctures exceedingly minute and densely crowded throughout, more or less obscured
very short, quite dense, brownish tomenturn; sternum 6 with a sub-basal row of black scopal hairs, otherwise largely bare, with a short, bare, apical rim protruding slightly beyond the transverse subapical fringe of short, dark hairs; scopa entirely black, punctures very close on sterna, becoming somewhat more distinct to sternum 5, apical margins very narrowly yellowish-hyaline, and no sternal fasciae evident.
MALE—Length 11-12 mm.; black, tegulae more brownish-piecous, all tarsi yellowish, front femora and tibiae yellowish or ferruginous in part; eyes slightly convergent below; clypeal margin about straight; mandibles 4-dentate, acute tip of the ventral process submedian in position; apical segment of flagellum somewhat flattened and slightly
dilated; lateral ocelli slightly nearer eyes than to margin of vertex; cheeks slightly wider than eyes, much narrowed below, with a shallow, somewhat elongated excavation beneath lower end of eye, which is pale yellowish tomentose, a dense white fringe just above; vertex shining in part, but punctures back of lateral ocelli deep, distinct and very close, with an impunctate area between Ocelli, punctures becoming slightly separated on each side of vertex, close and rather fine on cheeks above, becoming minute and densely crowded on cheeks below, lower half of face with fine, densely crowded punctures beneath dense pubescence; pubescence yellowish-white, rather elongate and very copious on lower part of face, short and inconspicuous on cheeks, but with a somewhat dense, posterior fringe; vertexwith short, erect, and rather thin, fuscous pubescence; thorax with rather pale pubescence beneath, becoming more or less fuscous laterally, pale yellowish on propodeum posteriorly, erect, black, short and rather copious on scutum and scutellum, scutum with some pale pubescence anteriorly, and scutello-mesothoracic suture with some fine, pale tomentum; punctures rather deep, distinct, fine and close on scutum, crowded except in center, scutellum with a narrow, median, sparsely punctate line, closely punctured on each side, axillae with fine, slightly separated punctures above; pleura dull, punctures very close, rather coarse below, becoming fine and densely crowded above; lateral faces of propodeum somewhat smoother and only obscurely sculptured, punctures of posterior face very fine and shallow but quite close; front coxal spines rather broad at base, spatulate and narrowly triangular, with narrowly rounded tips, a few very short, pale setae on coxae at base of spine, the coxae quite densely, creamy pubescent on each side; mid tibial spurs absent; front tarsi pale yellow, very broadly expanded or dilated, segments 1 and 2 subequal in length along posterior margin, but 1 very broadly expanded apically, deeply excavated,, overlying anterior margin of 2, this somewhat less broadly expanded apically, posterior fringe rather short but dense, pale yellowish to white, tipped with fuscous beneath; front tibiae piceous to ferruginous on outer face, the other two faces testaceous, apical portion of posterior face of front femora piceous, otherwise yellowish-testaceous, base slightly produced posteriorly; mid tarsi slender and elongate; hind basitarsi relatively short, clothed with dense, yellowish pubescence beneath, this forming rather definite, anterior and posterior fringes; tegulae very minutely and closely punctate; front wings pale fuliginous or brownish, hind wings subbyaline, veins brownish-piceous; terga 2-4 rather deeply, transversely depressed across base, basal margin of depressions only inconspicuously carl- nate, apical margins of terga 2 and 3 quite abruptly and deeply depressed laterally, this obliterated medially, but abrupt, deep and complete on 4 and 5, fasciae not evident; basal tergum with elongate, rather copious, yellowish pubescence, becoming somewhat intermixed with fuscous at extreme sides, discs of following terga with short but dense and erect, blackish pubescence, punctures fine and close on the more basal terga, becoming somewhat more distlnct on 3 and 4, uniformly close and rather fine on 5, 2 with a small, impunctate area on each side adjacent to apical groove; tergum 6 vertical, very finely and densely rugoso-punctate, with a quite deep, median excavation, the carina low, with a rounded, median, apical emargination, the two result-
ing lobes rather narrowly rounded, apical teeth not evident; tergum 7 largely covered, very narrowly truncate apically; sterna 1-4 exposed, rather closely and deeply punctate toward apical margins of each plate, becoming impunctate basally, apical margins of 2 and 3 very narrowly depressed, yellowish-hyaline, margin of 4 somewhat more broadly depressed and hyaline, more or less membraneous, these sterna with loose, apical fringes of elongate, pale hairs; setose area of sternum 5 rather broadly produced apically, separated from basal part of plate by a broad, membraneous area, but this considerably narrowed toward base, setae very fine and dense; setose area of 6 rather extensive, not appreciably separated medially, the more lateral and apical setae quite elongate, apical lobe rather narrowly produced and rounded, not at all angulate; gonostyli robust, rather abruptly narrowed just above base, conspicuously trilobate at apex. (as in xylocopoides, fig. 55)
DISTRIBUTION—Southern Florida and the Bahamas, March to October.
FLOWER RECORD—Flaveria.
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Updated: 2024-04-25 14:31:50 gmt
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