WILLIAMS: LARRID^ OF KANSAS. 171 



truncation moderate, width of third submarginal cell along the radius 

 less than the distance therefrom to the truncation; abdomen shining; 

 pygidium much as in sepulcralis, barely two times as long as the basal 

 width, polished (finely reticulate in a paratype), punctures large, sparse, 

 but well distributed. Black; legs of lighter color apically; wings a little 

 smoky towards the tip; abdominal segments narrowly testaceous apically. 

 Moderately pilose; abdomen well silvery fasciate. Length, 8 mm. (type). 



Phillips county, Kansas; August, 1912. Two paratypes, Ellis county. 

 J . Anterior margin of clypeus rounded-subtruncate, the lateral 

 angles somewhat dentiform; antennas long, joint 2 more than one-half 

 the length of 3, which is three-fourths the length of 4 ; interocular space 

 hardly as much as joints 2-4; frons dull, almost granulate, but finely 

 reticulate in addition; vertex more polished, with fine separate punctures; 

 thorax rather dull, closely punctate; disc of propodeum granulate and 

 with irregular raised lines, the sides more or less striate, posterior face 

 with a few coarse strije, a strong fovea, and a carina separating that 

 face from the disc; eighth ventral segment broadly but shallowly emar- 

 ginate. Colored as in the g . Length, 5-6 mm. 



Rush, Ellis, Osborne and Pratt counties. 



.Apparently allied to acuta Patt. and siniilis Roh. 



Tachysphex acuta (Patt.). 

 (Fig. 48, tip of wing, o .) 

 Larra acuta Patton; Proc. Bost. Soc. Nat. Hist., XX, 390; 1880. 5 . 



o . Stout. Anterior margin of clypeus broadly rounded-subtruncate, 

 laterally not acute, with an indistinct lateral tooth or entire, the apical 

 portion sparsely and large punctate, the basal portion very closely punc- 

 tate, the rim rather narrow ; antennae slender, joint 3 just a little shorter 

 than 4; interocular space perhaps a little wider than the length of 

 antennal joints 2 and 3; frons finely granulate; vertex very closely 

 punctate, postocellar depression not marked; thorax very closely punctate; 

 disc of propodeum finely reticulate-granulate, the sides granulate and 

 striate, the posterior face more coarsely so, and with a rather broad, 

 shallow fovea; legs moderately spinose; wings broad, venation rather 

 heavy, marginal cell broadly and obliquely truncate, the width of the 

 third submarginal cell along the radius about equal to the length of the 

 radius therefrom to the truncation; abdomen stout, finely reticulate; 

 pygidium about two and one-half times as long as its basal width, smooth 

 and polished and with an irregular row of deep punctures near its 

 strong margins, disc a little constricted preapically. Black; wings sub- 

 fuscous. Pile sparse (the specimens are worn) ; abdomen more or less 

 fasciate. Length, 7.5 mm. 



J . Anterior margin of clypeus subtruncate, rather broadly pro- 

 duced mesad (here the smooth rim is broadened), the lateral angles 

 sharp; antennae a little thickened mesad, joint 3 shorter than 4; inter- 

 ocular space hardly equal to joints 2-4; frons granulate; vertex with 

 distinct punctures; thorax rather coarsely close punctate; propodeum 

 with rather indistinct longitudinal striations, the sides not distinctly 

 striate nor granulate, posterior face with a distinct transverse carina 



