WILLIAMS: LARRID.E OF KANSAS. 163 



thorax more commonly, black (the thorax more rarely all ferruginous). 

 Face and thorax well covered with sericeous pile; abdomen silvery 

 fasciate. Length, 8-12 mm. Related to posterns and ashmeadii. 



^ . Slender. Anterior margin of clypeus broadly rounded out, not or 

 just a little emarginate and elevated apically; no lateral teeth, distally 

 with a few large punctures and finely reticulate in addition, basally very 

 finely and closely punctate; antenna somewhat thickened in the middle, 

 strongly ciliate along one side joint 2 about two-thirds the length of 3, 

 which is about two-thirds or more the length of 4; interocular space 

 nearly or quite equal to antennal joints 2-4; front finely granulate, 

 less so above and at vertex, postocellar depression moderately deep; 

 scutum and scutellum with rather large, separate punctures; the punc- 

 tures are a little coarser on the pleurae; disc of propodeum coriaceous, the 

 sides closely punctate, posterior face rather coarsely striate, with a deep 

 fovea; legs weakly spinose, the larger metatibial spur distinctly shorter 

 than first joint of hind tarsi; marginal cell broadly truncate; abdomen 

 rather narrow, finely and indistinctly punctate, much move strongly punc- 

 tate on the apical segments, eighth ventral segment broadly emarginate 

 and with a low and indistinct tooth mesad. Black; a spot on the scape 

 apically, the margin of the clypeus and the three basal abdominal seg- 

 ments, reddish; tarsi partly brownish. White pile on face and thorax; 

 abdomen silvery fasciate. Length, 7.5-9.5 mm. 



Numerous j j and a few ^ j , chiefly from southwestern Kansas; 

 July-August, 1911 and 1912. 



Tachijsphex dubius Fox. 

 (Fig. 71, clypeus, ^ .) 

 Tarhijsphex dubms Fox; Proc. Acad. Nat. Sci. Phil., 515; 1893. > . 



T . Rather slender. Anterior margin of clypeus rather narrowly 

 rounded out (imperfectly subtruncate) , the lateral angles rather sharp 

 to obtuse, nearly smooth on its apical one-third, the rest finely punctate; 

 antennae somewhat thickened and pilose, joint 3 distinctly shorter than 4, 

 the interocular space somewhat less than 3 and 4; front finely granulate; 

 vertex finely and closely punctate; thorax a little depressed anteriorly in 

 the middle, finely and closely punctate; disc of propodeum finely granu- 

 late, the sides reticulate-granulate, posterior face granulate and with 

 indications of larger stride, a transverse carina separates this face from 

 the disc, posterior fovea large and wedge-shaped; legs feebly spinose, 

 larger metatibial spur much shorter than first joint of hind tarsi; mar- 

 ginal cell rather widely obliquely truncate; abdomen fairly long, finely 

 reticulate, eighth ventral segment with a wide emargination and a low 

 median tooth, the sides dentifoVm. Black; first three abdominal segments 

 red; the apical segments largely reddish brown or darker; all the tarsi 

 more or less testaceous apically; wings clear. Well covei-ed with pile, 

 which on the middle of the scutum is vei-y sparse and of a brassy hue; 

 abdomen distinctly fasciate. Length, 7.5-9 mm. 



A fair series from north central Kansas presents some variations. The 

 insect seems very close to consimilis. 



