354 BULLETIN UNITED STATES GEOLOGICAL SUEVEY. [Voir. 



lum more densely punctured; enclosure of metatliorax sharply and 

 densely striate obliquely. Eirst and fifth joints of the posterior tarsi 

 shaded with black. First segment of, the abdomen more or less black 

 above, sometimes a black line on the base of the second segment above ; 

 the fourth and fifth segments vary from entirely black to red with a 

 black spot above. 



14. Peiononyx atrata (Lepel.) Sm.,cf ?. 



15. Haepactopus eufiventris (Cress.), 9 . 



Syn. Spliex rvfiventris Cress., Tr. Am. Ent. Soc. iv, p. 211. 



In this specimen, one of the spiracles of the first segment of the 

 abdomen is situated upon a protuberance. The claws of the tarsi are 

 rufo-piceous, except at the base. 



The males described below appear to be the Sphex ahdominaUs Cress. 

 (from which they differ only in the abdomen being entirely black), and 

 are regarded by me as the male of S. rujiventris, with which they agree 

 in all points of sculpture. Length five-eighths to six-eighths of an inch. 

 Black; mandibles near the tii) and the margin of the tegulcB inceous; 

 wings violaceous, fuscous, the apical border darker, claws of the tarsi 

 rufo-piceous except at the base; margins of the abdominal segments 

 dull piceous. Vertex very delicately and closely punctured, with shal- 

 low i^unctures of larger size intermixed ; ocelli enclosed by a delicate 

 impressed line, the anterior ocellus enclosed in a slight depression, from 

 which three lines (or one line) extend anteriorly, and one line extends 

 to the enclosing line posteriorly. Pronotum and mesonotum delicately 

 roughenetl, the latter ■s\ith two slight longitudinal ridges anteriorly en- 

 closing a narrow smooth area ; metathorax delicatelj^ striate transversely. 

 Abdomen very slightly and sparsely punctured, petiole a little longer 

 than the posterior cosse. The fourth and fifth ventral segments are 

 clothed with a fine brownish pile, which is visible only when viewed 

 from the side or in front. In another specimen, the two basal joints of 

 the antenme and a broad baud on the vertex behind the ocelli are dull 

 ferruginous, and the second segment of the abdomen has a piceous 

 tinge. 



Harpactopus Iwviventris {Spliex Iceviventris Cress., Proc. Ent. Soc» 

 Phila. iv, p. 463) differs from the other species (according to the descrip- 

 tion) in the thorax being smooth above and the face of the male being 

 adorned with silvery x)ile. 



16. Sphex ichneumonea Linn., ^ 9 . 



CRABEONID^. 

 Larrites. 



17. Laera ^thiops (Cress.), <? . 



More coarsely and closely punctured than the typical form from Colo- 

 rado. The clypeus is closely punctured and opake, the metathorax 



