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Eucera cercidis (Timberlake, 1969)
Synhalonia cercidis Timberlake, 1969

Life   Insecta   Hymenoptera   Apoidea   Apidae   Eucera
Subgenus: Synhalonia


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Identification
Extracted from: Timberlake P.H., (1969). A Contribution to the Systematics of North America Species of Synhalonia (Hymenoptera, Apoidea). University of California Publications in Entomology Volume 57

This species is closely allied to belfragei, birkmanniella, and rosae, but is recognizable by having clypeus more bulging than usual, with clypeal mark creamy white, very large, but rather well separated from margin of eyes, a supraclypeal mark, and the antennae short or barely reaching base of abdomen.

Male.—Black; small joints of tarsi ferruginous; tibial spurs pale testaceous. Labrum, clypeus, and small, transversely triangular supraclypeal mark creamy white. Clypeal mark large, moder¬ately well separated from margin of eyes, and subrectangularly notched on each side. Tegulae dark amber. Wings moderately dusky hyaline; nervures fuscous, subcosta black. Pubescence pale fulvous, moderately dense, becoming pale ochreous on face, cheeks, sides, and underpart of thorax, and first tergite of abdomen and white on legs. Hair on inner side of basitarsi pale ferruginous. Hair of tergites 2 to 6 mostly short and suberect, but appressed on apical depresdepres¬sions, that on disk of tergites 3 to 6 and appressed hair across apex of tergite 2 black, but other¬wise whitish, forming broad band on tergite 2 and narrow apical bands on following segments; pale hair at apex of tergite 6 tipped with fulvous across middle of segment. Hair of venter fuscous, with fringes of longer hair on each side white.

Head much broader than long, inner orbits of eye slightly divergent above. Vertex only slightly impressed on each side; lateral ocelli about their own diameter from margin of eyes and twice their diameter from nearest eye. Clypeus strongly bulging; oculoclypeal space moderately wide. Proboscis moderately long and reaching front coxae in repose. Antennae slender, shorter than usual, and hardly surpassing propodeum; joint 3 slightly more than twice as long as wide and nearly one-half as long as joint 4. Second submarginal cell receiving recurrent nervure one-third of its length from apex. Sternite 6 with impression on each side near base terminating in small rounded marginal lobe, disk with transverse patch of short, erect black hair across base, and short, inconspicuous hair between weak lateral ridge and apical margin on each side. Sternites 7 and 8 as figured. Parameral lobes of genital armature slender, gently bowed, dilated as usual at base, only slightly widened at apex. Length about 12.5 mm, anterior wing 9.4 mm, width of abdomen about 4.5 mm.


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Updated: 2024-03-28 13:56:18 gmt
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