Thomas Onuferko · 9
Epeolus americanus, Axillae mesoscutellum female |
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Thomas Onuferko · 9
Epeolus americanus, Dorsal view female |
Thomas Onuferko · 9
Epeolus americanus, female mesopleuron |
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Thomas Onuferko · 9
Epeolus americanus, Lateral view female |
Thomas Onuferko · 9
Epeolus americanus, Lateral view male |
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© Copyright source/photographer
· 7
Epeolus americanus, m, back, Rockingham, VA |
© Copyright source/photographer
· 7
Epeolus americanus, m, face, Rockingham, VA |
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© Copyright source/photographer
· 7
Epeolus americanus, m, right, Rockingham, VA |
© Copyright Laurence Packer 2014
· 7
Epeolus americanus FEM mm .x f |
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© Copyright Laurence Packer 2014
· 7
Epeolus americanus MALE mm .x f |
Thomas Onuferko · 5
Epeolus americanus, F mm X-comp |
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Thomas Onuferko · 5
Epeolus americanus, mm X |
Thomas Onuferko · 5
Epeolus americanus, mm X |
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Thomas Onuferko · 5
Epeolus americanus, F mm X-comp |
Thomas Onuferko · 5
Epeolus americanus, M mm X-comp |
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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. In Epeolus americanus, the fore wing commonly
has two submarginal cells. By contrast, in all other Epeolus in
Canada the fore wing typically has three submarginal cells.
However, in examined specimens of E. ainsllei, E. minimus,
and E. olympiellus (including the holotype) the second or third
submarginal crossvein terminates part of the way up or is
missing entirely in one or both fore wings. Epeolus americanus
can be more reliably separated from other Epeolus in Canada
on the basis of the following features: F2 of female antenna not
more than 1.1 x as long as wide, and Ti typically with narrow
discal patch (longitudinal band more than 1.1 x as wide as
breadth of apical fascia in dorsal view). The following features
in combination help further separate this species from other
Epeolus in Canada: pronotal lobe dark brown to black; axilla
with tip inconspicuous, and axilla rather small, the tip not
extending beyond midlength of mesoscutellum.
Distribution in Canada: Known to occur in most of Canada
except the high Arctic (Map 2).
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. The following morphological features in combination (excluding any that are specific to the opposite sex of the one being diagnosed) can be used to tell E. americanus apart from all other North American Epeolus except E. asperatus and E. barberiellus: in females, F2 is not more than 1.1 × as long as wide; the mesoscutum has distinct paramedian bands; the axilla is small to intermediate in size, not extending beyond the midlength of the mesoscutellum and the free portion is less than 1/4 as long as the entire medial length of the axilla, and like the mesoscutellum black; the mesopleuron is closely (i≤1d) and evenly punctate; T1 has a quadrangular discal patch, in dorsal view the longitudinal band is at least as wide as the breadth of the apical fascia; and the T1 and T2 apical fasciae are interrupted or at least greatly narrowed medially. Whereas in E. barberiellus the pronotal lobe and legs, at least from the tibiae to tarsi (sometimes the trochanters and femora as well), are reddish orange, in E. americanus the pronotal lobe and legs are brown or black. Epeolus americanus is also very similar to E. asperatus, but in E. asperatus the mesopleuron has much denser punctures ventrolaterally (most i<1d) than that of E. americanus and the T3 and T4 fasciae are never complete but broken or at least greatly narrowed laterally, as well as medially into separated or narrowly connected oval patches.
Redescription. This species was recently redescribed (Onuferko 2017).
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Identification | |
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 6 to 10 mm; forewing length 4.5 to 7 mm; labrum, clypeus , pronotal lobes antennae , legs , thorax mahogany to black, except apices of femora, tibiae, tarsi sometimes dark reddish orange; metasomal tergites, pygidium dark reddish orange to black; clypeus basally with pale appressed pubescence, hair above antennal fossae more dense, erect; pronotum with appressed, off-white pubescence; scutum with dense, off-white pubescence
on margins, except antero-medially; scutal disc with dark coppery pubescence, except white on two antero-medial, longitudinal, lines, few scattered hairs between; upper one half of mesopleuron with sparse, whitish pubescence, lower one half nearly nude; metanotum, posterior face of scutellum with appressed, off-white pubescence; metasomal tergite I with white pubescence, except black antero-laterally, postero-medially or large transverse
band on middle of disc, sometimes mixed with black on anterior face; tergite II with apical white hair band broadene laterally; tergites III, IV often interrupted or sinuate sublaterally; sternite V with a short, apical , dark brown to ferruginous fimbria; pseudopygidium about twice as broad as long; punctures of clypeus fine, dense, somewhat elongated longitudinally; those of vertex larger, more sparse medially, often separated by shinng areas around ocelli; scutum scutellum, lower one half of mesopleuron with punctures varying from nearly contiguous to separated by slightly more than one puncture diameter; propodeal enclosure moderately rugose dorsally, finely rugose medially, minutely roughened otherwise; forewings with two or three submarginal cells, subhyaline basally, darker, more pubescent apically, veins ferruglnous to black; flagellomere 11 as broad as long; vertex often with slight depressions lateral to lateral ocelli; axillae short, extending less than one half distance to posterior margin of scutellum, tips often blunt; scutellum usually weakly emarginate medially.
Male. Length 6 to 8 mm; forewing length 4 to 6 mm; Agrees well with description of female but differs as follows: flagellomeres broader than long; lower one half of mesopleuron often more densely punctured; pygidium often narrowed apically, sometimes acute, irregularly punctured; sternites IV, V bearing long, white to coppery hairs subapically, often darkened apically.
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Updated: 2024-04-19 13:24:56 gmt
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