WILLIAMS: LARRID_.E OF KANSAS. 167 



rather sparse except on pleura; on the head not extending high up on 

 the frons; abdominal fascias not very strong. Length (type), 7.25 mm. 

 Three specimens from Barton county; June, 1912. 



Tachysphex nigrocaudatus n. sp. 



2 . Moderately slender. Anterior margin of clypeus subtruncate, a 

 low lateral tooth; the clypeus much resembling that of crassiformis and 

 pleiwctiiiformis, only a little convex, rim rather wide, apical portion of 

 clypeus very little punctate, shining, the basal part rather closely punc- 

 tate; antennaa rather stout and blunt, joint 2 is about one-half of 3, which 

 is moi-e than three-fourths of 4; interocular space about equal to joints 3 

 and 4; frons with medium-sized, shallow punctures, which are separated 

 from one another by about their width, these interspaces finely reticulate; 

 vertex shining, with deeper, moj-e separate punctures, ocellar area moder- 

 ately cleft, the postocellar depression moderately deep; dorsum of thorax 

 shining, hardly depressed anteriorly mesad, with large, deep punctures, 

 their width or less apart; disc of propodeum medium granulate, with 

 short basal striae, sides rather coarsely but shallowly striate-granulate ; 

 an imperfect carina between the disc and posterior face, the latter 

 coarsely striate and with a large wedge-shaped fovea; legs moderately 

 spinose; third submarginal cell along the radius a little longer than the 

 second, and nearly equal to the remainder of the radius to the moderately 

 oblique truncation of the marginal cell; abdomen polished; pygidium well 

 defined, smooth, about two and one-fourth times as long as its basal width, 

 the sides nearly straight, a little constricted preapically, narrowly sub- 

 truncate apically, and with a few medium-sized deep punctures towards 

 the sides. Black; wings a little dusky; first two and one-half segments of 

 the abdomen red. Insect rather sparsely pilose; abdomen scarcely fasciate. 

 Length (type), 6.-5 mm. 



Rush county, Kansas; June, 1912. There are two others from Barton 

 and Ness counties; one of these has the pygidium a little more strongly 

 punctate than the type. 



^j . Moderately slender. Anterior margin of clypeus truncate, no 

 lateral teeth; antenna stout, rather blunt apically, pilose, joint 2 more 

 than one-half the length of 3, which is about three- fourths of 4; inter- 

 ocular space about equal to antennal joints 2-4; sculptured about as 

 in 2 ' the wedge-shaped fovea on the posterior face of the propodeum 

 broad and deep; eighth ventral segment broadly emarginate; first two or 

 three abdominal segments reddish. Pile rather abundant; the abdomen 

 thereby well fasciate. Length, 4.5-7 mm. 



A good series of this decidedly small larrid from western Kansas. 



Tachysphex plenociiliformis n. sp. 

 <j> . Rather slender. Anterior mai'gin of clypeus subtruncate, with 

 one lateral tooth (here greatly resembling crassiformis, fig. 72), some 

 confluent punctures at base of the rim, the apical half (with the above 

 exception) smooth, polished and inpunctate, the basal half closely punc- 

 tate, only moderately convex; frons with veiy close, shallow punctures, 

 which are sepai-ated by less than their width, the whole rather finely 

 reticulate; vertex polished, with rather fine, close, but shallow punctures; 

 ocellar area not very much impressed medially, the postocellar depression 



