WILLIAMS: LARRID^ OF KANSAS. 1(;9 



about one-half of 3, which is a little shorter than 4; interocular space 

 just a little greater than antennal joints 2 and 3; frons finely punctate, 

 the vertex more sparsely so behind the ocelli; scutum and scutellum with 

 moderately fine and close separate punctures, these punctures being 

 more separate on the sides; disc of propodeum very finely granulate, the 

 sides finely punctate-striate, posterior face distinctly striate and with a 

 large wedge-shaped fovea with its apex pointing ventrad; legs tolerably 

 spinose; venation normal, the marginal cell narrowly rounded-truncate; 

 abdomen inpunctate above except towards apex, the last ventral plate 

 with confluent punctures on its apical half; pygidium wide, a little less 

 than twice as long as its basal width (the type and cotype have the 

 pygidium only partly extruded), its strong margins strongly bowed out, 

 scarcely constricted preapically, apically moderately broad-truncate, the 

 disc quite sparsely punctate. Black; tarsi brownish red; wings clear; 

 abdomen red (this color is neither bright nor clear). Head, thorax, legs 

 and apex of abdominal segments with a good supply of silvery pile. 

 Length, 8 mm. (type). 



Morton county; August 5, 1911. Two paratypes, Morton and Grant 

 counties. 



Related to crenulatus, to which it runs down in Fox's key. The latter 

 species, besides being a good deal the larger, has the frons more finely 

 punctate and less sericeous, the abdomen bright red, and the clyp3us 

 more regularly crenulate. 



Tachysphex dentatus n. sp. 

 (Fig. 67, clypeus; 106, pygidium.) 



o . Robust. Anterior margin of clypeus with a long, distinct median 

 tooth, and a low, rather distinct one on either side (in addition to the 

 sharp lateral angle) , a curved shining fold or ridge behind the median 

 tooth; joint 3 of antenna just a little shorter than 4; interocular space 

 not greater than antennal joints 2 and 3; front coarsely (thimble-like) 

 granulate; vertex with finer separate punctures; scutum and scutellum so 

 closely punctate as to appear granulate, the sides about as dorsum; disc 

 of propodeum finely granulate, the sides finely striate-punctate, the 

 posterior face strongly striate and with a large wedge-shaped fovea ; 

 legs tolerably spinose; wings with the marginal cell rather broadly and 

 obliquely truncate; abdomen with a few punctures on the apical seg- 

 ments; pygidial area nearly flat and almost inpunctate, well margined, 

 the apex broadly rounded, the disc about one and one-third times or a 

 little less than its basal width. Black; tarsi more or less reddish brown; 

 wings clear; abdomen all red. Head and thorax with a fair amount of 

 whitish sericeous pile, which is sparse on the abdomen. Length, 9 mm. 



A single g from Morton county; August 5, 1911. 



A very distinct species. 



Tachysphex sepidcralis n. sp. 



o . Moderately stout. Anterior margin of clypeus rather broadly 

 rounded out, no lateral teeth, the lateral angles sharp though not acute, 

 the clypeus coarsely and sparsely punctate apically, closely so basally, 

 rim wide; antennae moderately slender, joint 2 is one-half of 3, which is 



