Bees from Neio Mexico. 409 



In typical homhoides the ])ubescence, where not black, is 

 white or whitisli, and on the male abdomen it covers the 

 three first dorsal segments. This is from 65° N. lat. 



In var. canadensis^ Cresson (c?), the pubescence is lemon- 

 yellow instead of white, and only the first and base of second 

 dorsal segments of the abdomen are clothed with yellow hair. 

 This is from Ontario. A male from Olympia, Washington 

 State, June 21, 1895, may be provisionally referred here, 

 though the hair of the vertex, scutellum, and hind part of 

 mesothorax is black, and the light hair which covers the first 

 two dorsal segments of the abdomen is strongly inclined to 

 ferruginous. It was collected by Mr. T. Kincaid. This 

 Washington form tends towards A. sodalis, Cresson, from 

 Nevada, which I feel convinced is only another variety or 

 race of bomhoides. A. insularis, Smith, from Vancouver 

 Island is known only in the female, but I suspect that it 

 may be a female homboides of the canadensis type, and belong 

 with the just-mentioned Olympia male. Whether in this 

 case the western form {insularis) can be separated subspecifi- 

 cally from the eastern [canadensis) can only be determined 

 in the light of mure ample material. A female from Sioux 

 Co., Nebr., sent by Prof. L. Bruner, resembles the var. neo- 

 mexicana in the colour of the pubescence, but differs in 

 having the hair of the vertex, scutellum, and mesothorax 

 black; herein it resembles insularis, but it differs in having 

 the pubescence of the tibise and tarsi black. 



Osmia [Chalcosmia) facetOy Cresson, 1878. 



Hab. Beulah, May 30, at flowers of Salix, 2 ^ {Wilmatte 

 Portey-), 1 ^ {Helen Blake). 



A variable species, best known by its steel-blue colour and 

 the structure of the apex of the abdomen. 



Osmia (^Ghalcosmia) densa, Cresson, 1864. 



Bab. Beulah, Aug. 18, 1 ? {Wilmatte Porter). 



New to New Mexico. Known by the hair of the clypeus 

 being black, thougii that of the adjacent sides of face is white. 

 The anterior margin of the clypeus is quite different from 

 that of female ybce^a. 



Osmia [Ceratosmia) lignaria^ Say, var. «. 



5 . — Smaller, only 9^ millim. long. 

 Pale hair on abdomen practically confined to first segment j 



