banks: psammochakidae. 239 



SOPHROPOMPILUS SUBANGULATUS, Sp. nOV. 



Type.— Cornell Univ. Coll. Paratype.— M. C. Z. 10,402. 



Colo.: Tabernash, August (Tucker Coll.); Calif.: Ingleside, 23-26 

 August (Bradley); B. Col.: Beaver Mouth, Selkirk Mts., 16-20 

 August (Bradley). 



9 Black, abdomen bluish, similar to *S. ingenuus in most respects, but- 

 much smaller, body not very hairy, the femora show no hairs, third joint of 

 antennae about equal first, pronotum slightly but plainly angulate behind, 

 metanotum with a deep median groove; inner spur of hind tibia nearly two 

 thirds of basitarsus; the tarsal comb has the last spine of the first joint longer 

 than the next joint, and the basal two not half their length apart (in ingenuus 

 the last is not as long as next joint, and the basal two farther apart). Wings 

 dark, but paler before the basal vein, venation about as in S. ingenuus. 



Length 8 to 10 mm. 



Differs from S. ingenuus by longer tarsal comb, and angulate pro- 

 notum. It differs from S. parvus in larger size; distinctly angulate 

 pronotum, and in a much longer comb on female tarsi. 



Agenoideus. 



But one species known which occurs across the northern part of 

 North America. 



Agenoideus humilis (Cresson). 

 B. Col.: Revelstoke, Selkirk Mts., 8-13 July. 



Gymnochares. 

 Two species known, the Arizonian one extending into Califorjiia. 



Gymnochares biedermanni (Banks). 

 Calif.: Claremont (Baker). 



Arachnophroctonus. 



1. Body uniformly yellowish unicolor. 



Body more or less marked with brown or reddish brown . . . .ferrugineus. 



