416 NEW SPECIES OF HYMENOPTERA 



length of antennal joints two and three; front densely punctured, appearing 

 granulate; interocellar space with fine, separated punctures; on the vertex the 

 punctures are small, shallow and slightly more than their diameter apart; 

 mesoscutum with small, shallow, well-separated punctures; mesoscutellum 

 poHshed, with a shallow, sparse puncturation; episterna granulate; disc of 

 propodeum granulate throughout; sides of propodeum finely striato-granulate; 

 posterior face moderately rugose; with a medium-sized, shallow, wedge-shaped 

 fovea; legs moderately spinose; the longer spur of the hind tibiae shorter than 

 the basitarsus; wings large; marginal cell fairly broadly and squarely truncate; 

 the second and third submarginal cells about equal in length on the radial 

 vein; abdomen moderately stout, not as long as the head and thorax com- 

 bined; pygidial area well defined; not twice as long as it is broad at the base; 

 finely reticulate throughout and with a number of fine, scattered punctures. 

 Black; tarsi somewhat reddish; three basal segments of the abdomen reddish. 

 Body with a thin, sparse, silvery pubescence, that on the front somewhat 

 heavier; the abdomen not silvery fasciate. 



cf . Unknown. 



Type, a female collected at Warbonnet Canyon, Sioux County 

 Nebraska, June 6, 1901, on Erysimum sp., (M. Caiy). 



Belongs to the tarsatus group; is distinct by the marginal rim 

 of the clypeus being very narrow, while on others of that group 

 it is rather wide; also differs in the puncturation of the body, in 

 the sculpture of the propodeum and in the sculpture of the pygid- 

 ium. 



Tachysphex angularis sp. nov. 



cf . Length 5.5 to 6 mm. Slender. Clypeus extended anteriorly so as to 

 form a triangular projection, the apical middle of the olypeus forming the apex 

 of the triangle; apical half of the clypeus polished, with a few large, deep 

 punctures; basal half of clypeus closely and finely punctured; joint two of 

 antennae more than one-half as long as joint three which is shghtly shorter 

 than joint four; interocular space at vertex about equal to the combined length 

 of antennal joints three and four; front densely punctured, appearing granu- 

 late; vertex with fine, well separated punctures; mesoscutum and mesoscutellum 

 with fine, well separated punctures; episterna closely punctured; disc of pro- 

 podeum finely rugose; sides of propodeum strongly, transversely striate; pos- 

 terior face of propodeum coarsely striate; the disc separated from the posterior 

 face by a strong carina; fovea deep, long, smooth, wedge-shaped; eighth ven- 

 tral segment broadly emarginate; legs moderately spined; longer spur of hind 

 tibiae shorter than the basitarsus; wings subhyaline; marginal cell broadly 

 and obliquely truncate at the apex; second and third submarginal cells about 

 equal in length on the radial vein. Black; tarsi somcwliat reddish; togulae 

 more or less testaceous; first three segments of abdomen reddish, liody 

 clothed with thin, short, silvery pubescence; the abdomen silvery fasciate. 



9 . Unknown. 



