AMERICAN HYMENOPTERA. 129 



siderably narrowed towards the marginal; legs fulvous; the coxae, tro- 

 chanters, base of anterior femora, and the four posterior tarsi, black ; 

 anterior coxa3 at tips, and the tibial spurs, white ; sometimes the four 

 posterior femora and tibia) are more or less varied with blackish ; ab- 

 domen subcylindrical, subsessile, black, immaculate. Length 3 — ol 

 lines. 



Ifab.—Coun., N. Y., Penna., Ills., (Coll. Am. Ent. Soc. and Mr. 

 E. Norton). 



Six S specimens. Allied to mcUiprs, but easily separated by the 

 prothorax being margined with white and by the white tibial spurs. 



99. Pompilus (Agenia) congruus, n. sp. 



Ffinalr. — Black, covered with very fine, dense, pale sericeous pile, 

 silvery on the thorax beneath and on the coxae ; clypeus very short 

 and transverse, its anterior margin very slightly arcuate; prothorax 

 larger than usual, its posterior margin nearly truncate, very slightly 

 arcuate; metathorax smooth and rounded, silvery on the sides; wings 

 Figure 10. hyaline, faintly clouded at tip, the wing-cells as in 



10: legs black, strongly sericeous, the anteri- 

 or tibiae and tarsi pale in front, coxse silvery; ab- 

 domen short, ovate, convex, subsessile, entirely 

 reddish-fulvous, strongly sericeous. Length 5 lines. 

 ILih. — West Virginia, (Coll. Am. Ent. Soc). 



One $ specimen. This fine species is remarkable for having the 

 third submarginal cell furnished with an appendiculate nervure at tip, 

 as represented in the above cut, being the only instance of the kind 

 that I have seen in this family. 



100. Pompilus (Agenia) longulus, n. sp. 



Male. — Long, narrow, black, opaque ; face short, somewhat silvery, 

 clypeus short, very transverse, truncate in front ; antennae long, slen- 

 der, filiform, entirely black ; thorax long, narrow, subdepressed above; 

 prothorax larger than usual, its posterior margin angular ; metathorax 

 rounded, somewhat silvery on the sides ; wings subhyaline, iridescent, 

 the apical margin fuscous; marginal cell long, sublanceolate; second 

 and third submarginal cells small, the former longest, the latter widest 

 and narrowed towards the marginal ; legs entirely black ; abdomen 

 rather short, subpetiolate, convex, reddish-fulvous, shining, the ex- 

 treme base of the first segment black. Length 4j lines. 



H<ih. — Dakota Territory, (Coll. Am. Ent. Soc). 



One % specimen. Remarkable for the long, narrow form of the 

 body. 



TRANS. AMER. ENT. SOC. (17) JUNE, 1867. 



