210 E. T. CRESSON. 



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

 oblique stripe on posterior margin and the tubercles silvery; tegulce shining 

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

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

 ing segment except narrow apical margin, pale red. Length .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— .70 inch. 



Five % 9 specimens. (Belfrage; Boll.) 



Ammophila vulgaris. 



Ammophila vulgaris, Cress. Proc. Ent. Soc. Phil, iv., p. 458. 



Five specimens. (Belfrage.) 



Ammophila piciipennis. 



Ammophila pictipennis, Walsh, Am. Ent. i., p. 101. 



Four % $ specimens. (Belfragc; Boll; Heiligbrodt.) 



Ammophila intcrcepta. 



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

 Six % 9 specimens. (Belfiage; Boll.) 



Ammophila gracilis. 



Ammophila gracilis, St. Farg. Hym. iii., p. 381. 



Nine % 9 specimens. (BelfVage; Boll.) 



Pelopceus ccmcutarins. 



Sphcx cementaria, Drury, Ins. :., p. 105. 



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

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

 men entirely black. 



Pelopocus cwrulcus. 



Sphcx cccruleus, Linn. Syst. Nat. i., p. 941. 

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



Pelopocus tetanus, n. sp. 



$• . — Color paler blue than that of cccruleus, and clothed with a thin whit- 

 ish sericeous pubescence, except on head where it is black; face silvery; tho- 

 rax sparsely punctured ; prothorax 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 with a shallow 

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

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

 cccruleus, pale sericeous. Length .70 inch. 



'J,. — Darker blue than 9> tne pubescence more dense; face densely silvery ; 

 wings hyaline, apical margin fuscous. Length .05 inch. 



Two specimens from Dallas and Comal Counties. Easily distin- 

 guished from csendeus by the pale pubescence of body. 



