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© Copyright source/photographer
· 5
Andrena cornelli, F, Back, VA, Gales County |
© Copyright source/photographer
· 5
Andrena cornelli, F, Face, VA, Gales County |
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© Copyright source/photographer
· 5
Andrena cornelli, F, Side, VA, Gales County |
© Copyright source/photographer
· 5
Andrena cornelli, M, Face, VA, Gales County |
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Beatriz Moisset · 1
Andrena cornelli, on flower |
© Copyright John Ascher, 2006-2014
· 1
Andrena cornelli |
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© Copyright John Ascher, 2006-2014
· 1
Andrena cornelli |
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Overview |
Reprinted with permission of the American Entomological Society from:
LaBerge, W. E. 1980. A revision of the bees of the genus Andrena of the Western Hemisphere. Part X. Subgenus Andrena. Transactions of the American Entomological Society 106: 395-526.
Please report text errors to: leah at discoverlife dot org.
Andrena cornelli is an eastern species which is readily separated from all other pale eastern species by the extremely sparse, long, simple, scopal hairs; It is closely related to A; tridens which it resembles in the short malar space, the short, narrow facial foveae, and the mandibles being toothed basally; The female of cornelli is like that of tridens but in addition to the sparser scopal hairs, has a dulled clypeus, longer facial quadrangle, and an apically rounded pygidial plate; The male of cornelli is almost indistinguishable externally from that of tridens although the facial quadrangle tends to be slightly longer, the first flagellar segment is usually longer in relation to the second segment and the face lacks brown hairs near the inner eye margins.
FEMALE. MEASUREMENTS AND RATIOS. — N = 20; length, 9-11 mm; width, 2-3 mm; wing length, M = 3.99±0.199 mm; FL/FW, M = 1.07±0:006; FOVL/ FOVW, M = 3.45 ±0.074.
INTEGUMENTAL COLOR. — As in tridens.
STRUCTURE. — Antennal scape length equals first two and three-fourths flagellar segments or more; flagellar segment 1 about as long as following two segments, segment 2 as long as 3 and slightly longer than broad; Eyes each three and three-fourths times as long as broad, inner margins parallel or converging slightly towards vertex; Mandible as in mandibularis; Malar space extremely short for the subgenus, as in tridens; Galea as in tridens; Maxillary palpus as in tridens but segmental ratio about as 1.0:1.0:0.8:0.8:0.5:0.6; Labial palpus as in tridens but ratio about as 1.0:0.6:0.6:0.6; Labral process and labrum as in tridens; Clypeus as in tridens but median impunctate line always broad, especially apically, punctures sparser and surface usually entirely dulled by reticulotransverse shagreening; Supraclypeal area, face above antennal fossae, facial fovea, vertex and genal area as in tridens; Thoracic form and sculpturing as in tridens but propodeum with dorsal enclosure usually entirely roughened or mostly so and lateral surface with rugulae in posterior fourth or less or absent.
Metasomal terga 1-5 sculptured as in mandibularis; Pygidial plate broad, apex rounded, internal raised triangle present; Sterna 2-5 as in frigida.
VESTITURE. — White to pale ochraceous except as follows: facial fovea internal short hairs dark ochraceous or paler; terga 5 and 6 medially with long hairs brown; inner surfaces tarsi pale yellow; Form and distribution of hair as in mandibularis except as follows: terga 2-4 with distinct apical pale fasciae; hind tibial scopal hairs simple, extremely long and sparse, punctures giving rise to these hairs separated mostly by two to four puncture widths; tibial posterior surface hairs unusually long.
MALE. MEASUREMENTS AND RATIOS. — N = 14; length, 7-10 width, 1.5-2.5 mm; wing length, 3.26±0.222 mm; FL/FW, M = 1.00±0.006; FS1/FS2, M = 1.73 ±0.033.
INTEGUMENTAL COLOR. — As in tridens.
STRUCTURE. — As in tridens except as follows: clypeus shagreened at least in posterior half and often throughout; flagellar segment 1 more than one and one-half times as long as segment 2.
Terminalia as in figures 77-81, note sternum 7 emarginate and sternum 8 capitate.
VESTITURE. — White to ochraceous as in tridens but face without brown hairs near upper part of inner margins of compound eyes, inner surfaces hind tarsi pale yellow; Form and distribution of hairs as in mandibularis or tridens.
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Identification | |
Identification Tips: The males are difficult to separate from A. tridens, in addition to what is mentioned in the guide look for associations with Rhododendron, a comparatively longer face, and coming out later in spring than A. tridens.
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Updated: 2024-04-16 07:51:18 gmt
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