Hi PPLEMENT. 337 



hind coxa? at least on a part of it, blackish. Feet yellow ; the 

 hind tibite of the female are indistinctly infuscatcd at the tip; those 

 of the male are distinctly infascated »>r even blackened, especially 

 upon their inner side. The hind tarsi are entirely black. Wings 

 tinged with blackish-gray. 



Hub. New York (Osten-Sacken) ; Illinois (Lc Baron). 



29. G. exiguus, nov. sp. %. — iEneus, nitens, antennis nigris, facie 



ochracea, coxis anticis totis, pedibus lamellisque hypopygii flavis. 



Bronze-colored, shining ; antenna? black ; face ochre-yellow ; the whole 



fore coxae, the feet, and the lamellae of the hypopygiuin yellow. 

 Long. corp. 0.12. Long. al. 0.12. 



More bronze-colored than metallic green, shining. Fronl 

 covered with a gray-whitish dust. Antennae altogether black, 

 the narrow face brownish ochre-yellow. The crescent-shaped 

 lamellae of the hypopygium yellowish. Fore coxae entirely yel- 

 low ; also the four posterior coxa? mostly yellow, but the whole 

 outside of the middle coxa and a considerable portion of the out- 

 side of the hind coxa? blackish. Feet yellow ; the tarsi, with the 

 exception of the basis, strongly infuscatcd. Wings gray. 



Hab. Illinois. (Le Baron.) 



Gen. V. PELASTOXEIRIS. 



Corrected Table for determining the Species. 

 , f Cilia of the inferior orbit black. 2 



I Cilia of the inferior orbit whitish. 6 



i A bright white, glittering spot on the posterior margin of tbe thorax. 

 2^ - 1 longicauda Loew. 



i No such white spot on the posterior margin of the thorax. 

 o f Wings blackened. 2 lugubris / 



1 Wings tinged with blackish-gray. 4 



!Fore coxa? altogether yellow ; lamellae of the hypopygium long. 

 3 laetua Loew. 

 Fore coxae not altogether yellow ; lamellae of the hypopygium short. 5 

 R f Only the basis of the fore coxae blackened. 6 lamellatus Loew. 



I The whole fore coxae blackened. 7 abbreviatus Lot w, 



„ f Fore coxae blackened at the basis. 4 vagans Lot 10. 



t Fore coxae entirely yellow. 7 



r Dorsum of the thorax of a uniform color. n cognatus Lot w, 



7 s Dorsum of the thorax copper-colored, with blue-green Btripes. 

 I v alternans Lot w. 



22 



