OF WASHINGTON, VOLUME XII, 1910. 101 



orbits punctured, the vertex more finely so; flagel robust, the first joint 

 distinctly longer than the second; dorsulum and scutel with distinct sep- 

 arated punctures; mesopleunt granular, the central part more finely so; 

 enclosure with irregular strut; metathorax granular with a fine rugose 

 appearance on the sides, middle furrow distinct; femora very robust, 

 hind tibia 1 arcuate in the middle when seen from above; second cubital 

 strongly narrowed above: venation as in Neofoxia; petiole shorter than 

 the remaining part of the segment, widening apically, flat above with 

 the margins distinct: abdomen narrow, elongate: pygidium very narrow, 

 fully three times as long as wide, coarsely granular. Black; flagel tes- 

 taceous; mandibles, apex of second, and most of the third segment 

 rufous; teguht, turbercles, and four anterior tibiae and tarsi whitish: 

 hind tarsi brownish. Wings hyaline, strongly iridescent; venation dark 

 brown. 



Tvpc locality: Los Angeles County, California, (Coquillett)- 



Type: No. 12355^ U. S. National Museum. 



Psen (Mimesa) similis, new species. 



Belongs to group nigra and in the long antennae is related 

 to longicornis and mcllipcs, but is perhaps nearer to nigra or 

 mi\ia. The slender antennae, striato-punctate vertex, narrow 

 distance between the lateral ocelli, almost impunctate meso- 

 pleurae and dorsulum, the large, smooth space in the enclosure, 

 and slightly dusky wings will serve to distinguish this from its 

 allies. 



Male. Length a little more than 5 mm. Anterior margin of the cly- 

 peus notched; supraclypeal area finely granular; frontal carina notstrong 

 but present; head finely striato-punctate, the punctures in same places 

 more abundant than the striae; distance between the lateral ocelli much 

 less than the distance from one of them to the nearest eye margin; an- 

 tennas a little longer than the head and thorax, simple, not clavate, 

 third joint about the same length as fourth; dorsulum, scutellum, and 

 mesopleurae shining, with only a few widely separated small punctures; 

 enclosure with a few slightly oblique striae, the diamond-shaped area 

 large and smooth; rest of the metathorax except the finely granular 

 pleura 1 finely reticulate; legs and venation normal, petiole trisulcate, about 

 the same length as the hind femora; abdomen broadened and not es- 

 pecially elongate. Black; the four anterior tarsi pale brown, silvery 

 pubescence not dense. Wings slightly dusky hyaline, iridescent, vena- 

 tion dark brown 



Type hca/ity: Florissant, Colorado, July 17, 1907 (S. A. 

 Rohwer). 



Tvpe: No. 12357, U. S. National Museum. 



