AMERICAN HYMENOPTERA. 121 



margin of the prothorax arcuate ; nietathorax short, rather abrupt, 

 rounded above ; wings uniformly pale yellowish-hyaline, slightly dusky 

 at tips; the cells shaped as in the preceding species; legs ferruginous, 

 the cox;\i, trochanters and extreme tips of the tarsi, black ; abdomen 

 short, ovate, convex, yellowish-ferruginous; extreme base of abdomen 

 and of the first and second segments black ; apical margin of the first 

 and second segments and a stain on the middle of the latter, fuscous; 

 apical segment densely clothed with a golden pubescence. Length 6 

 lines. 



ILth. — Vera Cruz, Mexico. (Coll. Am. Ent. Soc, from Mr. Sarto- 

 rius). 



One 9 specimen. Easily recognized by the broad yellowish band 

 on the anteniuie. 



82. Pompilus (Priocnemis) velox. 



Priornemis velox, Smith, Journal of Entomology, i, p. ."^QS, 9 • 



'■^Female. Length 5 lines. — Ferruginous, inclining to a brick-red; 

 the head black, with the clypeus, mandibles and antennae ferruginous, 

 the six apical joints of the latter, and the tips of the mandibles black. 

 The sutures of the base of the metathorax and post-scutellum black ; 

 the pectus and the coxae behind black; the trochanters and extreme 

 base of the femora black; the wings flavo-hyaline, the anterior pair 

 with a fuscous fascia and the tips fuscous, the nervures testaceous. 

 The extreme base of the abdomen black, and its apex with a little fus- 

 cous pubescence." 



Hah. — "Oajaca, Mexico." Not seen. 



Subgenus AGENIA. 

 This subgenus is characterized by the legs being destitute of spines, 

 (Fig. 8, h, posterior leg) ; the form of most of the species is more 

 Figure 8. graceful than in the preceding subgenera, with 



I the legs longer and slenderer; the wings vary 

 in their style of neuration, but most of the spe- 

 cies have the marginal cell lanceolate, the se- 

 ,.==>^=^ cond submarginal long and narrow and the 

 third submarginal large (as in Fig. 8, a) ; the 

 abdomen in most species is subpetiolatc, sometimes subsessile or petio- 

 late. Some species resemble those of the genus Ceropales very much, 

 having four distinct submarginal cells, long, slender legs, &c., but the 

 antennae of the 9 are convolute and the head differently shaped. The 

 species have all of them good distinctive characters, and are easily se- 

 parated. 



TRANS. AMKE. ENT. SOC. (16) JUNE, 1867. 



