Thomas Onuferko · 9
Epeolus interruptus, Axillae mesoscutellum female |
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Thomas Onuferko · 9
Epeolus interruptus, Dorsal view female |
Thomas Onuferko · 9
Epeolus interruptus, Lateral view female |
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Thomas Onuferko · 9
Epeolus interruptus, Lateral view male |
© Copyright Laurence Packer 2014
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Epeolus interruptus FEM mm x ZS PMax |
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Thomas Onuferko · 5
Epeolus interruptus, F mm X-comp |
Thomas Onuferko · 5
Epeolus interruptus, mm X |
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Thomas Onuferko · 5
Epeolus interruptus, mm X |
Thomas Onuferko · 5
Epeolus interruptus, F mm Xb-comp |
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Thomas Onuferko · 5
Epeolus interruptus, M mm X-comp |
Thomas Onuferko · 5
Epeolus interruptus, F mm X |
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Thomas Onuferko · 5
Epeolus interruptus, F mm Xb-comp |
Thomas Onuferko · 5
Epeolus interruptus, mm Xb |
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Thomas Onuferko · 5
Epeolus interruptus, mm Xb |
Thomas Onuferko · 5
Epeolus interruptus, M mm X |
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Overview | |
Extracted with permission from: Onuferko, T.M. 2017. Cleptoparasitic Bees of the Genus Epeolus Latreille (Hymenoptera: Apidae) in Canada. Canadian Journal of Arthropod Identification No. 30: March 30, 2017. doi:10.3752/cjai.2017.30
http://cjai.biologicalsurvey.ca/o_30/o_30.html
Diagnosis. The distinguishing features that separate E.
�nf erruptus from all other Epeolus in North America include the
presence of a blunt median process on the metanotum, which
is partially if not entirely obscured by tomentum, and the very
wide discal patch of TI uniquely forming a rounded triangle with
concave lateral sides. Other defining attributes include the
following in combination: F2 of female antenna noticeably
longer than wide; mesoscutum with paramedian band; axilla
with tip inconspicuous, and axilla rather small and tip not
extending beyond midlength of mesoscutellum; and T1�T4 with
basal and apical fasciae interrupted medially.
Distribution in Canada: Central to Western Canada, east of
the Rocky Mountains (Map 8).
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 8 mm.; black, basal segments of antennae, mandibles, tubercles, tegulae, and legs, in large part testaceous; segments of flagellum beyond the first slightly longer than broad, more brownish below, piceous above; lateral ocelli separated from margin of vertex by a space slightly greater than their diameter; cheeks about half width of eyes, posterior margin obscurely carinate below, rounded above; median length of labrum about half the breadth, with a pair of very minute, apical denticles, with a low sub- median transverse ridge which is slightly interrupted medially; inner margin of mandible with a distinct, subapical angle or tooth; scutellum somewhat outcurved, with a rather deep median impression, axillae broadly united to lateral margins, only very slightly protuberant, tips hardly reaching mid transverse line of scutellum (fig. 110); wings with the usual three submarginal cells, lightly infuscated, veins brownish-testaceous; face with some dense, whitish tomentum around bases of antennae, but clypeus and other areas of head largely bare; venter of thorax with some dense, white tomentum, but lateral surfaces of pleura largely bare below, upper part quite densely whitish tomentose; margin of pronotum quite densely pale yellowish tomentose, continuing as a fringe of short hairs around tubercles; scutum with a pair of very narrow, longitudinal lines of yellowish tomentum on each side of mid-line anteriorly, the scutello-mesothracic suture very narrowly yellowish tomentose; metanotum with a rather dense tuft of pale tomentum near mid-line, bare on each side, adjacent margin of scutellum narrowly whitish fasciate from one extreme side to the other, lateral, dorsal areas of posterior face of propodeum with a dense, whitish tomentose patch; anterior face of basal abdominal tergum with a triangular, yellowish, tomentose patch on each side, this distinctly separated from an apical tomentose fascia which is rather widely interrupted medially and quite strongly constricted on each side, becoming broadened laterally, the resulting dark patch more or less triangular, covered with thin but dense black tomentum; terga 2-4 with apical tomentose fasciae which are interrupted medially, slightly constricted on each side and broadened again toward extreme lateral margins, slightly separated from rims; tergum 5 with a rather large patch of whitish tomentum on each side toward apical margin; punctures of head deep and distinct, rather close in general but somewhat separated and rather coarse below antennae toward eyes, becoming closer on vertex and cheeks, fine and distinct on clypeus, more minute on lateral areas of face below; scutum and scutellum rather uniformly densely rugoso-punctate throughout, punctures of axillae somewhat more coarse and distinct; pleura very densely rugose above, with rather coarse punctures over lower half which are to some degree separated, interspaces shining; discs of abdominal terga very finely, closely and uniformly punctate throughout; tegulae very finely, closely and distinctly punctate anteriorly, punctures becoming more minute and obscure posteriorly; pseudopygidium transverse and extremely short, barely evident.
MALE�Agrees with description of female in general, but segments of flagellum slightly broader than long, tegulae more fully punctate posteriorly, thoracic punctures in general somewhat coarser; pygidial plate about as long as basal width, marginal carina distinct, broadly rounded apically, surface with rather obscure but close punctures, bearing suberect, short hairs.
DISTRIBUTION � Texas, Illinois and Michigan to Georgia and New Jersey; April to July.
FLOWER RECORDS�C1iry&tnthemum
and Trifolium. Recorded by Robertson (1929) on Coreopsis. Krigia, Psoralea and Ruddbeckia.
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Identification | |
The position of interruptus in teh genus Epeolus is not clear, but it seems to indicate relatinsh
ips with E. bifasciatus. It can be differentiated from E. bifasciatus by the absence of tubercle
s on the frons, clavate lines on the scutum, and less coarsely punctured mesopleuron, scutum, and vertex.
Extracted from: Brumley R.L., (1965). A Revision of the Bee Genus Epeolus Latreille of Western America North of Mexico. All Graduate Theses and Dissertations. 2682
Female. Length 7 to 10 mm; forewing length 6 to 8 mm;
labrum black or mahogany, lateral margins usually with some reddish color; clypeus black; scape, pronotal lobes, tegulae
clear reddish orange; pedicel, flagellomere I occasionally mahogany, remaining flagellomeres usually dull, brownish mahogany, reddish orange otherwise; coxae, trochangers , femora , tibiae
black or mahogany to reddish orange, tarsi always reddish orange; scutellum , axillae reddish orange to burnt red , often bordered with black; scutum black, except often burnt red on antero-lateral corners; mesopleuron black, except often with dark red markings
on a median, transverse, dorsally arcuate band, or as small,
median areas on anterior , posterior margins ; integument of metasoma black or mahogany, apices of tergites clear; pygidium dark reddish orange ; clypeus with few, scattered , appressed, silvery hairs; antennal fossae bordered with dense, appressed, silvery pubescence; vertex with sparse, erect, short, coppery or silvery pubescence, hairs longer near upper mesal margins of compound eyes; postero-medial margins of head with irregular border of semi-erect, densely plumose, silvery hairs ; pronotum, posterior face of scutellum, metanotum medially, upper one half of mesopleuron, lateral margins of posterior face of propodeum with appressed , whitish pubescence; scutum with short , coppery hairs , except whitish or yellowish pubescence on lateral, posterior
margins, two antero-medial, longitudinal, cUNatelines; metasomal tergite 1 with whitish or yellowish pubescence, except black antero-laterally, antero-medially, postero-medially, large, transverse band on disc ; tergites II , Ill , IV with whitish or yellowish apical fasciae broadened laterally, often interrupted medially; sternite V with apical fimbria of long, coppery to silvery hairs of unequal lengths; pseudopygidium short, about three times broader than long, with silvery hairs extending
well beyond apex of tergite; clypeus with small, shallow, dense punctures , lateral margins largely impucntate; frons , vertex rugosa-punctate, except punctures more widely spaced near upper mesal margins of compound eyes; scutum, scutellum finely to moderately rugosa-punctate; lower one half of mesopleuron with interspaces from twice as large as average puncture diamter to about as large; propodeal enclosure moderately rugose dorsally, finely, transversely, irregularly striate medially; remainder
of posterior face of propodeum with a narrow, impunctate band bordering lateral margins of enclosure , finely , shallowly rugosapunctate otherwise; forewings with three submarginal cells, subhyaline basally with many short, erect hairs , darker, more pubescent apically, veins mahogany; labrum often depressed longitudinally between apical tubercles; flagellomere II nearly three fourths as broad as long; axillae short, pointed apically; scutellum with a broad , median emargination ; metanoturn with a blunt, median tooth.
Male. Length 7 to 10 mm; forewing length 6 to 8 rnm; Much the same as female but differs as follows: flagellomere II nearly as broad as long; sternite Ill with long, whitish, semi-erect, apical hairs laterally, IV, V with row of long, ~olden, suhapical hairs ; pygid ium broader at base, broadly rounded to subtruncate apically, black to burnt red, with shallow, elongate punctures .
Extracted from: Onuferko TM (2018). A revision of the cleptoparasitic bee genus Epeolus Latreille for Nearctic species, north of Mexico (Hymenoptera, Apidae). ZooKeys 755: 1–185. https://doi.org/10.3897/zookeys.755.23939
Diagnosis. Unique to E. interruptus among North American species of Epeolus are
each of the following morphological features: the metanotum has a blunt median process and T1 has a wide triangular discal patch with concave lateral sides. Epeolus interruptus most closely resembles E. tessieris in that the mesoscutum has short paramedian
bands; the axilla does not attain the midlength of the mesoscutellum and like the
mesoscutellum is ferruginous (although both are occasionally black in E. interruptus);
the mesopleuron commonly has sparser punctures ventrolaterally than in upper half,
with the interspaces shining; and T1–T4 have medially-interrupted metasomal fasciae.
However, in E. tessieris the metanotum is flat and T1 has a trapezoidal to nearly semicircular discal patch.
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Names | |
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Natural history | |
May be the parasite of Colletes aestivalis.
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Updated: 2024-04-25 00:59:08 gmt
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