210 E. T. CRESSON. 



apex sometimes with a silvery spot on each side ; pleura sparsely punctured, an 

 oblique stripe on posterior margin and tlie tubercles silvery; tegulse shining 

 black; wings hyaline, dusky at tips; legs entirely black, £0 ncwhat sericeous; 

 abdomen subsericeous, extreme apex of second joint of petiole and the follow- 

 ing segment except narrow apical nvargin, pale red. Lengtii ,75 — .85 inch, 



^, — Face much narrower and with the clypeus densely silvery; pubescence 

 of head and thorax more dense; sides of second joint of abdominal petiole 

 sometimes reddish, the following segment with a central black line above. 

 Length .70 — .75 inch. 



Five % 9 specimens. (Belfrage; Boll.) 



Ammopliila vislgai'is. 



Ammophila vuir/ar-is, Cress. Proc. Ent. Soc. Phil, iv., p. 458. 

 Five specimens. (Belfrage.) 



Ammopliila piciipenuls. 



Ammophila piciipcnni.t, "Walsh, Am. Ent. i., p. 164. 

 Four % 5 specimens. (Belfrage; Boll; Ileiligbrodt.) 



Ammophila intcrccpta. 



Ammophila intcrcepta, St. Farg. Hym. iii., p. 378. 



Six % 2 specimens. (Belfiage; Boll.) 



Ammophila gracilis. 



Ammophila (ji-acilis, St. Farg. Ilym. iii., p. 381. 



Nine % 9 specimens. (Belfrage; Boll.) 



Pelopoens cemeutarius. 



Sphc.v cancntaria, Drnry, Ins. :,, p. 105. 

 Six specimens. (Belfrage; Boll; Hciligbrodt.) One specimen 

 has the petiole of abJoaiou entirely yellow, and another has the abdo- 

 men entirely black. 



Pelopceus casrulcus. 



Sphex ccerv.leus, Linn. Syst. Nat. i., p. 941. 



Eleven % 9 specimens. (Belfrage; Boll; Heiligbrodt.) 



Pelopceus texanus, n. sp. 



9. — Color paler blue than that of cceruhus, and clothed with a thin whit- 

 ish sericeous pubescence, exce))t on head wiiere it is black; face silvery; tho- 

 rax sparsely punctured ; jirothorax deeply notched above; mesothorax deeply 

 channeled medially; scutellum smooth, shining, sparsely punctured; meta- 

 thorax shining, finely and closely punctured on the sides, more sparsely so 

 above, where the surface is nearly smooth, not grooved, but \v\ih. a shallow 

 fovea near apex, pleura closely punctured; tegulse pale on outer margin; 

 wings fuscous, paler at base; legs with short pale pubescence ; abdomen as in 

 cceruleus, pale sericeous. Length .70 inch. 



^. — Darker blue than 9> t^''^ pubescence more dense; face densely silvery; 

 wings hyaline, apical margin fuscous. Length .65 inch. 



Two specimens from Dallas and Comal Counties. Easily distin- 

 guished from cxrideus by the pale pubescence of body. 



