112 
Psyche 
[April 
broadly membraneous and transparent on the apical margin. 
Length 11 mm. 
Type: Male (Type No. 15717, Mus. Comp. Zool.); Little 
Spokane, W. T., Washington Territory July 26, 1882 (Samuel 
Henshaw, collector). Paratypes: 1 male, Camp Umatilla, W. T. 
(across the Columbia River from Umatilla, Ore.), June 26, 1882; 
2 males, Alta Meadow, California, altitude 9000 ft., Aug. 23, 
1917 (W. M. Wheeler, collector). 
This is quite near M. manifesta Cress, but in the latter 
species there are no spines on the mesosternum, the apical spine 
of segment 7 is much longer, and the hind tarsi are more nearly 
normal. The inferior mandibular teeth, the front tarsi, and the 
carina of segment 6 are almost exactly alike in the two species. 
It is quite possible that this is the male of M. wheeleri , since two 
of these males were caught in the type locality of that species. 
Megachile pseudonigra n. sp. 
$ . Head broad, eyes parallel, pubescence fuscous, hardly 
black; supraclypeal plate finely punctured, somewhat sparsely 
so in center; clypeus very finely and closely punctured above, 
sparsely and more coarsely so on apical two-thirds, apex entire, 
with a raised or thickened impunctate edge; mandibles broad, 
black, obscurely reddish apically, with a very few scattered 
punctures above, doubly punctate on outer face at base, dis- 
tinctly 4-dentate, the two apical teeth truncate, the third and 
fourth acute, a bevelled cutting edge between the latter; cheeks 
fairly broad, closely punctured above and below, shining above; 
vertex slightly rounded, punctures close medially, rather widely 
separated laterally; lateral ocelli about equally distant from eyes 
and edge of vertex; front below ocelli densely and finely punc- 
tured; antennse black above, obscurely reddish below, middle 
joints but slightly longer than broad. 
Thorax with fuscous pubescence, apparently blacker on sur- 
face of mesonotum (specimen somewhat rubbed); mesonotum 
sparsely punctate medially, closely so laterally and behind, the 
surface finely tessellated; scutellum closely and finely punctate, 
and the pleura very finely and closely punctate above, more 
