THE CANADIAN ENTOMOLOGIST 401 



brownish black, hind margins of segments faintly reddish. Body 

 very slender, abdomen sessile; wings faintly dusky, basal transverse 

 veins of fore wings disjointed; second submarginal longer than 

 broad, receiving first recurrent at middle; third submarginal 

 higher than long, narrowed above, receiving the second recurrent 

 before middle, latter vein faintly bent out in middle; these cells 

 nearly as in atrata, but in that species the second recurrent is 

 received at middle and the discoidal is consequently longer. 



Length 5.8 mm. 



From Niagara Falls, July 31, and Boston, Aug. 1, both N. Y. 

 (Van Duzee). Differs from A . atrata in white spurs, and more slender 

 body. 

 Priocnemis hesperus, n. sp. 



Very similar to the Eastern P. subopaciis, the marginal cell 

 blunt at tip as in that species. It is separated by the coarsely 

 striated metanotum. It is black, with few long hairs on vertex, 

 and mesonotum, none on the face, pronotum nor metanotum, 

 but some on the venter and apex of the abdomen The vertex 

 and the ocellar triangle are broader than in P subopaciis, the eyes 

 not being as much approximated as in that species; the abdomen 

 is more shining than in P. subopaciis. The wings are deep black, 

 the venation like that of subopaciis, but the outer side of marginal 

 cell is more angulate rather than rounded; size the same. 



From Stanford Univ., Calif. (Doane). 



Priocnemis fortella, n. sp. 



This is close to P.fortis, but differs in pale wings, much smaller 

 size, in the still shorter antennae, and longer hind spurs. The body 

 is black and densely hairy, the face and ocelli about as in P. fortis; 

 the antennae short and thick; the fourth and fifth joints hardly 

 twice as long as broad (three times or more in fortis) ; metanotum 

 striate as in fortis; the hind tibia, even in female, still less serrate 

 than /cr/w, the serrations scarcely distinguishable; the inner spur 

 of the hind tibia fully one-half the length of the metatarsus (in 

 fortis scarcely one-half the length of the metatarsus). Venation 

 about the same, the veins extending out to the margin; the fore 

 wings are scarcely darkened (deep black m fortis). 



Length 10 mm. 



From Great Falls, Va., June 12, 29. 



