100 THE ENTOMOLOGIST. 
SOME BEES FROM COLORADO. 
By T. D. A. CockereE.t. 
“Osmia globosa, Cresson, variety a. 
@. Length 9°5 mm.; hair of face and front mixed black and 
white, entirely white at sides of face, nearly all black on clypeus ; 
occiput with long pale hair; thorax with long white (faintly ochreous- 
tinted) hair, abundant on scutellum; legs with mainly black hair, on 
anterior femora behind it is white; wings dilute reddish. Abdomen 
short but not globose. 
Hab.—Bluebird, Boulder County, Colorado, July 25th, 1915 
(Cockerell). At the same time and place I took Titusella proni- 
tens, Ckll. and Megachile wootoni subsp. rohweri, Ckil. This 
looks like a distinct species, but is probably a form of O. globosa. 
It may be the hitherto unknown female of O. globosiformis, Ckll., 
but the wings are much darker and redder than in the male of 
that species. 
Osmia propinqua, Cresson. 
Boulder, Colorado, male visiting daffodil (Narcissus) flowers, 
April (Hazel Andrews). 
Osmia ramaleyt, Cockerell. 
Boulder Canon, in road, May 22nd, 1912; male. 
Osmia kenoyert, Cockerell, variety a. 
?. Hair of thorax above white, with a faint creamy tint; hind 
margins of abdominal segments blue-green. 
Baldy Mtn., Boulder County, Colo., above timber-line, 
July 24th, 1915 (Cockerell). . 
Halictus pruinosiformis, Crawford. 
Nebraska Hill, Colo., female at flowers of Salix, just below 
timber-line, July, 1915 (Kenoyer). This species ranges un- 
changed from the Middle Sonoran zone to the upper limit of the 
Hudsonian. 
Halictus frasere, sp. 0. 
@. Length about 8 mm. ; head dark greenish, the clypeus black ; 
mesothorax yellowish-green, especially the shining posterior middle ; 
other parts of thorax blue-black ; tegule piceous, rufous posteriorly ; 
wings suffused with brownish, stigma amber-colour; abdomen with 
the first two segments green, the others black; segments 1-4 with 
broad dense apical fringes of pure white hair, that on the first inter- 
rupted in middle. Hair of head and thorax dull white; clypeus 
