442 Mr. T. D. A. Cockerell on XLTII. — North-American Bees, and a new Homopteron. By T. D. A. Cockerell. Apoidea. Augochlora confusa coloradensis (Titus). Augochlora coloradensis, Titus, Canad. Entom., May 1901, p. 133. The difference in the colour of the legs between this and A. confusa, mentioned by Titus, does not hold good ; but coloradensis is uniformly smaller, and seems to be a valid subspecies. Hab. Mesilla Park, N. M., at flowers of Aster tenaceti-folius, May 20, 1 ? (Martin I). Cockerell) ; Boswell, N. M., Aug. 21, at flowers of Euphorbia rnarginata, both sexes {T. D. A. Cockerell). New to New Mexico. I have confused the Mesilla Valley females with A. neglectula, which is a very much bluer species. The male of neglectula is very easily known from that of coloradensis by the fourth ventral segment of abdo-men not being in the least emarginate, the darker and the very long antennae, and the legs black with metallic tints, not in the lest marked with pale yellow. The region between the antennae and the ocelli in male neglectula is a particularly fine deep blue, while the clypeus and supraclypeal area are green. The third and fourth antennal joints (<$) are dull black and extremely short, being broader than long, but they have also this shape in coloradensis. Andrena mimetica, sp. n. $ .. — 12^ millim. long. Head, metathorax, and legs black ; abdomen and dorsum of thorax bluish green, exactly the colour commonly seen in O&mia ; pleura dark blue ; pubescence long and erect, black and rather dull white ; on face (except at sides above), cheeks, and occiput it is white ; on vertex black ; facial quadrangle much broader than long ; disk of clypeus shining, with strong close punctures, and an impunctate median line; facial foveas short and black ; process of labrum rather narrow, truncate, and strongly emarginate ; tongue short ; second and third joints of labial palpus triangular, fourth narrow-cylindrical; antennae entirely black, fourth joint shorter than fifth, third at least as long as fourth and fifth together ; mesothorax more or less granular, with strong
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