Reprinted from Cockerell, T.D.A. 1898. Canadian Entomologist 30: 189. The copyright on this work has expired.
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MALE. – Length about 8mm., black with long white hair; face wholly black.
SUBGENERIC CHARACTERS. – Antennae fairly long, abdomen without hair-bands; stigma large; second submarginal cell longer than first on cubital nerve; apical angle of third discoidal cell a right angle; apex of abdomen truncate ; no subapical lateral spines. Two characters italicized differ from Parandrena, s. str.
SPECIES CHARACTERS. — Head transversely oval; mandibles slender, dark, notched within, becoming ferruginous at tips; process of labrum inclined to be bifid; flagellum faintly brownish beneath; face covered with long silky white hair, except at the extreme sides, where it is black; cheeks and occiput with white hair, except behind the tops of the eyes, where it is black; front and vertex coarsely rugulose, the vertex with distinct grooves; clypeus roughened, with no median smooth line; thorax small, not so broad as the head; mesothorax dull, minutely roughened, with numerous obscure but large shallow punctures; base of metathorax irregularly reticulated with raised lines; pubescence of thorax long and thin; tegulae dark brown, with shallow punctures; wings perfectly clear; nervures and stigma dark brown; second submarginal cell very long, receiving the recurrent nervures at about the end of its first and beginning of its last fifths. Legs slender, brown-black, with pallid hair; abdomen oval, shining, punctures small, feeble and sparse; no hair bands, scattered white hairs becoming dense at the apex.
HABITAT.- Southern California, one sent by Mr. Fox. I think this is a derivative of Andrena independently from Parandrena, but it has the general build and appearance of the latter genus. It is named after Mr. Enoch whose admirable preparations of the mouth-pieces of the bee are of constant assistance to the apidologist.
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