16 
PSYCHE 
[Februaiy 
OSMIA MELANOTRICHA 11. Sp. 
9 . — Lent;th 9 to nearly 10 nim.; similar to (). airiveniri.t hut is usually larger, 
the Maine specimens of the latter species varying from 7 to 9 mm. When the face 
of O. mdanotricha is viewed from above the middle third longitudinally appears 
to be clothed with much coar.se black hair and the other thirds are white haired. 
This is rather suggestive of 0. alboJatcralis Cklb, which, however, has some black 
hairs on thorax above, black hair on second abdominal segment, etc. Dorsal 
abdominal .segments 3 to 5 are clothed with short black hair, these .segments having 
also a very indi.stinct submarginal band of short pale hair. The abdominal hair 
is best .seen in lateral view, and is an easily recognizable character. The ventral 
.scopa is den.se and black. 
Seven females; six on Rubus strigosus, June 16-18; one on Epilobinm angusti- 
folium, July 16, 1905. 
0. melanotricha occurs also in Colorado; at Ward, Boulder County, altitude 
about 9()0() feet, on flowers of Phacelia (W. P. and T. 1). A. Cockerell). The Col- 
orado specimen differs a little from the iNIaine ones; the flagellum is decidedly 
reddish beneath, and the front and mesothorax are largely black. 
( )SMIA GLono.SA Cr. 
1864 O.wiia globom Cr. $, Proc. hint. Soc. Phil. 3:36. 
The female was taken on the flowers of Gaylussacia resinosa but bears no date 
(from my notes, however, I learn that I have collected on the flowers of the huckle- 
berry on June 15th. J. II. L.). The specimen was compared with Cre.sson’s type 
by Mr. II. L. Viereck; it is a little larger and has the pubescence paler. 
The type locality is Great Slave Lake. Cresson does not mention any collector 
but it was ])robably obtained by Robert Kennicott (rf. Pop. Sci. (Monthly, Jan. 1906, 
p. 70). The male which has not been described was collected on Salix, May 7th. 
(S'- — Length 7 mm. Black, resenddes the female, face densely clothed with 
long white pube.scence; antennae wholly dark, extending back as far as the tegulae; 
pube.scence on thorax as in the female long and pale ochraceous. Abdomen sub- 
globose, rather coarsely but shallowly punctured, except on apical margins; basal 
segment clothed with long white hair; sixth segment concave in lateral view, with 
thin but long white pubescence, its edge with a feeble hardly noticeable emargination ; 
seventh deeply notched, the points obtu.se; stipites large, yellowish, touching at tips, 
clothed above with very long dull white hair; spurs black. 
Closely related to 0. frigida Sm., separable in the female by the large amount 
of l)lack hair on face; in the male lyy the total ab.sence of a fringe of reddish hair 
on ajjical margin of fifth abdominal segment, and the black ventral surface of abdo- 
