Records of Bees. 3G7 



normal, mandibles 3-dcntat(>, antennaj black ; tegulai piceous, 

 blue in front. Win^^s dusky; first r. n. joining second s.m. 

 about or hardly 1^ times as far from base as second from 

 apex. Legs black, with black or sooty hair; hind coxa^ and 

 femora strongly bluish, hind basitarsus flat and rather broad. 

 Abdomen with inconspicuous black hair on segments 3 to 5 ; 

 scopa black. 



Perhaps only a variety of 0. pentstemonis, Ckll., l)ut that 

 has the hair of pleura all light, and the last dorsal abJoMiinal 

 segment with fine whitish tomcntum. 



Ilah. Boulder, Color.. do, June D, 1905, at flower no. 10 

 (IF. 1'. Cockerel!). 



0. pentstemonis occurs at higher altitudes ; in Boulder 

 County we have taken it at Ward, about 9000 ft., at flowers 

 of Pentstemon, July 1905. In my original account of 

 0. pentstemonis I wrote : — " It may prove to be the female of 

 0. Wheeleri." It is, perhaps, significant that at Boulder, 

 June 4, 1905, my wife took a male Osmia which I have 

 referred to 0. Wheeleri, Ckll., variety. 



Osmia pikei, sp, n. 



? . — Length about 8 mm. ; width of ablomen 3. 

 A short broad species, with abdomen almost exactly circular 

 in outline. Dark greenish blue, the ab lomen shitiing ; hair 

 of head and thorax long and coarse, black on clypeus, cheeks 

 and pleura, dull white with black intermixed on front, vertex, 

 and thorax above j some white hair also on sides of face* 

 head and thorax densely punctured ; head rather large ; 

 mandibles with four prominent sharp teeth, the apical one 

 long ; clypeus normal, the two orange brushes below its 

 anterior edge well developed; antenna3 black, flagellum very 

 faintly reddish beneath ; scutellum and hind part of meso- 

 thorax yellowish green, contrasting with the blue-black 

 nietathorax ; tegulai black, greenish in front. Wings dusky ; 

 first r. n. joining second s.m. only a little further from base 

 than second from apex. Legs black, with black hair, fine 

 ])ale tomentum on underside of hind femora and tibia? ; hair 

 on underside of hind tarsi reddish except at sides. Abdomen 

 very sparsely punctured; first segment with pale hair, 

 second with pale and black, the others with black, the last 

 (except apically) with some appressed pale hairs; scopa 

 black. 



Distinguished especially by its comparatively small size, 

 broad form, and 4-dentate mandibles. The colour of the 

 abdomen is the same as in 0. propinqua. 



