46 T. D. A. and W. P. Cockerell on Bees. regions being so distinct from one another in general appear-ance, and have, besides the characters given by Dobson, the very important difference in the incisor teetli. The first upper incisor in Olaucony clevis is bifid, having an outer or rear cusp. Olaucony clevis Floioevi, sp, n. Colour above pale fawn, the bases of the fur greyish ; the lower side cream-colour, yellower on the tliroat, paler on the belly. The fur on the forehead ends in a point barely in advance of the eyes, and the furred area is limited in extent in all directions, barely encroacliing on to the upj)er arms, and leaving the tail and legs entirely bare. The skin of the face and ears is nearly black and naked, with the exception of a few short hairs more cons[)icuous round the lips. The wing-membrane is pale and transjjarent. with the veins and lines showing slightly darker; the posterior portion in front of the tibise and the distal [)ortion of the interfemoral mem-brane is yellowish white. The upperside of the forearms, legs, and tail, and all the [)roximal portion of the wings and interfemoral membrane, are thickly studded with dark warty papillae. The measurements of the type taken by the collector from the animal in the flesh, an adult male, are: — Head and body 47 millim., tail 34, hind foot 5"5, ear 12, forearm 35. The specimen in spirit gives the following measurements : — Head and body 42, tail 34, hind foot b''^, ear 12, forearm 36-5. In size and general colour this bat somewhat resembles Scolophilus Schlieffeni: the body-colour is, however, paler above and biighler on the lower parts, and the furred area is less extensive ; but the paler wing-membrane, the dark face, and the extraordinary shagreening on the forearms, tad, and surrounding membranes distinguish this new species at a glance. The skull is readily distinguished from that of Scotophilus by its rounded form and short facial portion ; the lower jaw is likewise more rounded or blunter. VIII. — Contvihutions from the New Mexico Biological Station. — IX. On certain Genera of Bees. By T. D. A. and WiLMATTE P. Cockerell. (1) Anthoprorinm. InTrans.Amer.Ent. Soc. xxvi. 1899, pp. 58-64, Mr. W. H. Ashmead has given tables for the separation of the genera of
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