no. 1837. NEW SPECIES OF WASPS— ROHWER. 571 



depression behind the lateral ocelli not sharply defined, with a 

 median furrow; interocellar area indistinctly parted, front without 

 an impressed line; space between the eyes at the vertex subequal 

 with the length of the third antennal joint; antennae slender, longer 

 than the head and thorax united, scape shorter than the two follow- 

 ing joints, third joint longer than fourth; mesonotum and scutellum 

 with rather large, well-defined, separated punctures, those of the 

 scutellum more widely separated, scutellum not impressed; dorsal 

 aspect of propodeum coarsely granular, sides and posterior face 

 punctured, posterior face with a median furrow which is separated 

 from the dorsal aspect by a carina; legs feebly spined, inner calcarium 

 of posterior tibise much shorter than the basitarsis; second cubital 

 cell on radius longer than third; abdomen finely coriarous, the first 

 three dorsal segments broadly depressed apically; pygidium well 

 defined, a little more than twice as long as wide at base, apically 

 impunctate, basally finely granular with a few punctures. Shining 

 black; apices of mandibles and tarsi piceous; scape in front, four 

 basal flagellar joints and a spot on tegulse ferruginous; wings dusky 

 hyaline, the duskiness more prominent as a band below stigma, 

 iridescent; venation blackish; insect almost nude. 



Boulder, Colorado. One female collected on flowers of Helianthus 

 pumilus, September 8, 1908, by S. A. Rohwer. The eyes in life 

 are dark rufous. 



Type.— Cat. No. 13754, U.S.N.M. 



TACHYSPHEX GILLETTEI, new species. 



Female. — Length 11 mm. Clypeus rounded out anteriorly with a 

 small lateral tooth; region around the antenna? with close, rather fine 

 punctures; front with larger and well separated punctures; interocel- 

 lar area with the punctures denser than those on the front; vertex 

 punctured like the front; space between the eyes at the vertex 

 about equal to the length of antennal joints two and three; seen from 

 the front the head between the eyes is emarginate; third antennal 

 joint but little shorter than the fourth; mesonotum at the sides 

 closely finely punctured; in the middle with a few scattered punc- 

 tures, giving it a shining appearance; scutellum convex, shining, not 

 impressed, sculptured like the mesonotum; dorsal aspect of propo- 

 deum finely granular, sides and posterior face finely, transversely 

 striated; fovea of posterior face not very large; second cubital on 

 the radius much wider than the third on the same nervure; legs 

 rather strongly spinose; abdomen shining, impunctate; pygidium 

 about twice as long as broad at base, with a few rather large punc- 

 tures. Black; tegulse testaceous; spines and tarsi beyond the first 

 joint rufous; abdomen clear red; eyes (dry) greenish; wings hyaline, 

 venation testaceous; entire insect almost nude. 



