52 Journal of Entomology and Zoology 



2 Antennae entirely dark, tiagellum with only the faintest red 

 tint beneath toward the apex. 



S Flagellum ferruginous beneath, except first and last joint; 

 mesothorax polished, with well-separated punctures; first ventral 

 segment of abdomen green with piceous margin, the others without 

 metallic color; the second to fifth with straight hind margins, not 

 emarginate, the sixth emarginate. 



Osmia cyiuwpoda sp. n. 

 9 Length nearly 10 mm., robust, deep indigo blue, the abdomen 

 brilliant and shining; pubescence black, mixed with white on scutel- 

 lum, and very slightly at sides of metathorax; antennae black; 

 femora and tibiae strongly bluish or purplish; tegulse with the an- 

 terior half blue; wings brown, paler along the veins; clypeus ordi- 

 nary; mandibles tridentate; facial quadrangle longer than broad; 

 mesothorax strongly and densely punctured; area of metathorax 

 dull. 



Habitat: Claremont, California {Baker; Pomona coll. 182). 

 In the table in Ent. News, June, 1910, this runs to O. gabrielis, 

 from which it is known by being smaller, face narrower, punctures 

 of mesothorax distinctly larger and less crowded, scutellum with 

 partly pale hair, and bluish tibiae. The rich blue-purple color of 

 the abdomen is exactly the same in both. Pomona coll. 181 

 (Mountains near Claremont, Baker) is O. pogonigera Ckll. 



Osniia cyaiwsonia sp. n. 

 ? Length nearly 7 mm. ; deep indigo blue, the middle of the 

 abdomen stained with greenish; hair black, mixed with fine short 

 pale hairs on mesothorax; tuft behind wings, and hair at sides of 

 metathorax and sides of first abdominal segment white; mandibles 

 with two large sharp teeth and two minute ones. Very close to O. 

 tristella Ckll., but separated by the partly pale hair on mesothorax, 

 the distinctly metallic femora and tibiae, tegulse bright blue in front, 

 hair of tarsi brownish, first r. n. joining second s. m. more remote 

 from base. Also resembles O. hypoleuca Ckll. but is separated by 

 the shorter second s. m., abundant black hair on scutellum, and 

 black hair on tubercles. In O. hypoleuca there is a patch of glisten- 

 ing pale hair on lower part of pleura, and in O. cyanosoma there is 



