134 Psyche [June-Sept. 
Macropis steironematis opaca Michener n. subsp. 
Male: Similar to M. steironematis but hind metatarsus 
dull, very minutely roughened on outer side; punctures of 
hind tibise smaller than in M. steironematis, the surface 
between them minutely roughened; punctures of vertex 
more numerous, leaving only very small impunctate regions ; 
surface between punctures of vertex slightly roughened. 
Length 9 mm. 
Holotype: Morgan's Ferry, Yakima River, Washington, 
July 1, 1882, in the collection of the Museum of Comparative 
Zoology at Cambridge, Massachusetts. 
Differs from the typical form of this species by the much 
duller surface of the legs and vertex. 
Macropis morcei Robertson 
Two specimens from Montana (no further data) are from 
the collection of the Academy of Natural Sciences of Phila- 
delphia. 
Fig. 1. 1, Dorsal view of genitalia of Macropis ciliata Patton; 
2, Lateral view of genitalia of Macropis ciliata Patton ; 3, Lateral view 
of genitalia of Macropis steironematis opaca Michener. 
The following key will separate the American species of 
the genus : 
1. Entire body closely punctured; length about 9 mm. 
Male: Middle metatarsus broad, wider near base, and taper- 
ing apically; supraclypeal area yellow, and lateral face 
