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Andrena argentiscopa Viereck, 1917
Life   Insecta   Hymenoptera   Apoidea   Andrenidae   Andrena

Overview
Reprinted from Viereck, H.L. 1917. New Species of North American Bees of the Genus Andrena Contained in the Collections ofthe Academy of Natural Sciences of Philadelphia. Transactions of the American Entomological Society 43: 365-407. The copyright on this work has expired.

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TYPE. — No. 4044, The Academy of Natural Sciences of Philadelphia.

TYPE LOCALITY. — California. (E. Norton.)

Related to A. (A.) bisalicis Viereck.

FEMALE. — Length 7 mm.; body black, mostly covered with whitish hairs; head with its facial line : transfacial line : : 45: 57, axial line : temporal line :: 23: 12, malar fine : joint 3 of antennae :: 1.5: ?9 (sic), ocelloccipital line : greatest diameter of lateral ocellus :: 4: 4, elevated portion of malar space nearly wanting, front rather finely, longitudinally striate, not elevated into a welt along the fovea, fovea at most : ocellocular line :: 5:10, foveal band represented by a shining line at upper end of the inner eye margin, distance between fovea and ocelli: ocellocular line :: 6:10, fovea slightly attenuated below its middle where it is nearly as wide as the greatest width of the fovea, the latter continued to a point far below the clypeal line, fovea filled with pale cacao brown hairs, on its upper half, with pale ochreous hairs on its lower half, face dullish, finely reticulate, with indistinct punctures that are as many as three or four puncture widths apart, clypeus trenchantly elevated above the apical margin, slightly convex, sculptured like the face except that the punctures are larger and better defined, clypearea apparently wanting, clypeus thinly hairy, its sculpture not at all hidden by hairs, labrarea narrowly truncate its width at base : length down the middle :: 8: 4, width at apex : length down the middle :: 3:4, labrarea at base nearly half as wide as the labrum, the latter with a fringe of pale golden hairs, labrum with a median longitudinal crista between the labrarea and the apical edge of labrum, joint 3 of antennae probably : 4 5 : : 9:8, joints 4 and 5 probably thicker than long, the succeeding joints probably as thick as long or little longer than thick except perhaps joints 11 and 12 which are probably distinctly longer than thick, antennae probably blackish throughout, mandibles typical, robust, extending to the outer edge of the labrarea, black except for the apical half which is mostly dark reddish, palpi nearly typical; thorax covered with an abundance of whitish hairs which are much shorter on the dorsulum, than the almost whitish hairs on the mesopleura, dorsulum dullish, finely reticulated and punctured like the face, notauli represented by an impressed line, mesopleura with whitish hairs, sculptured somewhat like the dorsulum but not so distinctly, scutel hairy and sculptured .much like the dorsulum but more shiny, metanotum mostly finely rugulose, dullish, tegulae dark brown, polished, wing base partly blackish brown, subcosta blackish brown, stigma pale yellowish stramineous, rest of veins dull stramineous, with a blackish tinge, first recurrent vein received by the second submarginal cell a little before the middle and apparently one and one-half times as far from the first transverse cubitus as the first transverse cubitus is from the stigma on the radial vein, nervulus almost exactly interstitial and forming an acute angle with the first abscissa of the discoidal vein, membrane uniformly tinged with brown, legs blackish brown throughout, legs covered with brownish golden and whitish hairs, scopa typical, its hairs mostly silvery, hairs at base above decidedly darkened, hind metatarsi at most apparently a little narrower than mid metatarsi; propodeum with its enclosure poorly defined, dullish and finely reticulated, with short ill defined ridges at extreme base, rest of upper face of propodeum sculptured somewhat like the mesopleura and covered with pale whitish hair, propodeal pleura finely reticulated, with sparse shallow punctures, floccus whitish; abdomen with its tergum shiny, finely reticulated and indistinctly punctured, the punctures from two to six or more puncture widths apart on the first tergite, the punctures somewhat closer on the succeeding tergites, second, third and fourth tergites with a thin, apical, whitish hair band that is broadly interrupted in the middle of the second and third tergites, first, second, third and fourth tergites with the depressed margin brownish edged with pale stramineous, second tergite with its elevated portion down the middle : depressed portion :: 11: 7, fifth tergite shiny, reticulate, its punctures coarser than on the other tergites, pygidium nearly planate, with a shallow furrow on each side, truncate at apex, brownish, tergum with inconspicuous pale hairs, in addition to the hair bands, fimbria pale golden.

Names
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