Reprinted from:
Cockerell, T.D.A. 1910. XXXV. � Descriptions and records of bees. � XXVI. Annals and Magazine of Natural History (8)5: 256-264. The copyright on this work has expired.
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MALE. � Length slightly over 7 mm.
Black, without light markings on face; all the tarsi light ferruginous; hind tibiae light ferruginous with a median dark cloud; pubescence dull pale ochreous; abdomen shining, very minutely and inconspicuously punctured, without any definite hair-bands except, rather indistinctly, at sides of segments; head broader than long; mandibles ferruginous at apex; clypeus densely covered with hair; checks ordinary; vertex dull; antennae thick, moniliform, third joint conspicuously shorter than fourth, flagellum obscure reddish beneath; mesothorax dull and granular, with sparse small punctures; area of mesothorax with delicate but evident ridges; tegulae fulvous. wings reddish hyaline, nervures and stigma clear ferruginous; stigma large; third s.m. more than twice as broad as second; second abdominal segment depressed a little less than one-third.
This is extremely close to an insect from Fort Collins, Colorado, determined by Mr. Viereck as A. texana, Cresson, but not agreeing well with Cresson�s description (Viereck must have had access to Cresson�s type however). It differs by the proportionately shorter third antennal joint, lighter tegulae, redder wings, more delicate sculpture of mesothorax, and somewhat narrower face. In Viereck�s table in Entom. News, July 1907, it runs to A. daeckei, but differs by having the second dorsal segment depressed less than one-third; in Robertson's table of Illinois species it runs in Trachandrena to claytoniae, which it very greatly resembles, differing however, in the much less coarsely sculptured area of mesothorax. If run in Andrena s. str. it goes to nasonii, but differed in the antennal joints.
HABITAT. � Dallas, TX (bull): Berlin museum,21288
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