NO. 1897. BEES OF THE GENUS OSMIA—COCKERELL. 225 



*titusi CocKERELL, 1905. Los Angeles, California (Davidson). 

 Also in New Mexico. See Ann. and Mag. Nat. Hist., May, 1907, p. 369. 

 Ventral ecopa white. Also at Las Cruces, New Mexico (C. XL T. Townsend). 

 Tijpe.— Cut. No. 14481, U.S.N.M. 

 trevoris Cockerell, 1897. Seattle, Washington, May (Kincaid). 



Female 8 mm.; hair of face long, all black, of thoracic dor8um orange-fulvous. 

 *tristella Cockerell, 1897. Olympia, Washington (Kincaid). 



Pubescence of face, vertex, thoracic dorsum, and ventral scopa wholly black. 

 Type— Cat. No. 6863, U.S.N.M. 

 universitatis Cockerell, 1907. Boulder, Colorado, April (Edna Baker). Tab. 7. 

 vallicola Cockerell, 1907. Florissant, Colorado, June (Rohwer). 



Visitfi Ribes. Superficially like 0. mcrlensv^; male flagellum wholly dark; legs 

 strongly metallic. 

 *vicina Cresson, 1864. Virginia. 



Same as pumila. 

 viridimicans Cockerell, 1897. Olympia, Washington (Kincaid). 



Female brilliant peacock-green, with the pubescence entirely black; abdomen 

 somewhat elongate and nearly parallel sided. 

 viridior Cockerell, 1907. Boulder, Colorado, May (Rohwer). Tab. 1. 

 Allied to 0. marginipennis. 



Also from Chimney Gulch, Colorado, May 9, 1899 (Oslar). 

 viridis Cresson, 1864. Rocky Mountains, Colorado. 



Same asfulgida, or possibly a distinct but very closely-related form, 

 wardiana Cockerell, 1907. Ward, Colorado, 9,200 feet (W. and T. Cockerell). 

 Tab. 1. 

 Also at Georgetown, Colorado, in the Baker collection, 

 watsoni Cockerell, 1911. Albuquerque, New Mexico (J. R. Watson). 



Male antennae with last joint flattened, more or less discoid, shining black. 

 *wheeleri Cockerell, 1906. Florissant, Colorado (Rohwer). Tab. 1, 2. 



The male has the hind basitarsue toothed, 

 wilmattae Cockerell, 1906. Boulder, Colorado (W. P. Cockerell). Tab. 1, 2. 

 Allied to 0. brevis. Typical wilmattx has a good deal of black hair mixed with the 

 white on scutellum. The two following are regarded as varieties of wilmattae 

 (female), but are possibly distinct: 

 Variety a. Hair of scutellum white; mesothorax shining green; face rather nar- 

 rower; hair of face and vertex coarse and black, a little white on occiput; hind 

 margins of abdominal segments shining olive-green. Florissant, Colorado, June 

 21 (S. A. Rohwer). 

 Variety b. Hair of scutellum at least nearly all white; mesothorax dull blue-black; 

 hair of face and vertex coarse and black, a little white on occiput; hind margins 

 of abdominal segments dark purple. Copeland Park, Boulder County, Colorado, 

 Sept. 1907 (Hite). 

 The following species are only known in the male sex : Osmia abnormis, amain, aprilina, 

 chlorops, collinsix, conjunctoidcs, cyaneonitens, davidsoniella, enena, eutrichosa, 

 erigua, foxi, integra, integrella, inurbana, iridis, marginipennis, mertensix, m^titia, 

 montana, nigritula, pasadense, physarix, pseiidamala, pulsatillse, pusilla, i~iistica, 

 seneciophila, sericea, tarsata, texana, universitatis, vallicola, viridior, watsoni, and 

 nheeleri. 

 The following, with black ventral scopa, are only known in the female sex: armaticeps, 

 atrocyanea, brcvihirta, cali/omica, cara, casta, cerasi, cyanella,florissanticola, gabricUs, 

 gaillardix, giliarum, grandior, grindelix, grinnclli, hendersoni, hypolcuca, justa, 

 leonis, lignariella, longula, malina, megaccphala, nassa, nigri/rons, nigrifroiis 

 subaustralis, novomexicana, pascoensis, permorata, pikci, pogonigcra, putata, 

 quadriceps, sanctx-rosx, senior, stasima, subtrevoris, trevoris, tristella, uardiana, 

 and uilmattx. 



20441°— Proc.N.M.vol.42— 12 15 



