32 Journal of Entomology and Zoology 
¢@ Antenne entirely dark, flagellum with only the faintest red 
tint beneath toward the apex. 
é 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 cyanopoda sp. n. 
@ 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; antenne black; 
femora and tibie strongly bluish or purplish; tegule 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 tibie. 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. 
Osmia cyanosoma 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 tibia, tegule 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 
