SUPPLEMENT. 



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

 hind tibiae of the female are indistinctly infuscated at the tip ; those 

 of the male are distinctly infuscated or even blackened, especially 

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

 tinged with blackish-gray. 



Hab. New York (Osten-Sacken) ; Illinois (Le Baron). 



29. G. exiglllis, nov. sp. $ . JEneus, nitens, antennis nigris, faci& 

 ochracea, coxis anticis totis, pedibus lamellisque hypopygii flavis. 



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



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

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



More bronze-colored than metallic green, shining. Front 

 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 coxae mostly yellow, but the whole 

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

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

 exception of the basis, strongly infuscated. Wings gray. 



Hab. Illinois. (Le Baron.) 



Gen. V. PEL,ASTOtfEURUS. 



Corrected Table for determining the Species. 



, f Cilia of the inferior orbit black. 2 



I Cilia of the inferior orbit whitish. 6 



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

 1 longicauda Loew. 

 No such white spot on the posterior margin of the thorax. 3 



g f Wings blackened. 2 lugubris Loeiv. 



\ Wings tinged with blackish-gray. 4 



!Fore coxae altogether yellow ; lamellae of the hypopygium long. 

 3 leetus Loew. 

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



- ( Only the basis of the fore coxse blackened. 6 lamellatus Loew. 



^i 

 t. The whole fore coxae blackened. 7 abbreviatus Loew. 



. f Fore coxae blackened at the basis. 4 vagans Loew. 



\ Fore coxae entirely yellow. 7 



f Dorsum of the thorax of a uniform color. 5 cognatus Loew. 



7 \ Dorsum of the thorax copper-colored, with blue-green stripes. 



8 alternaus Loew. 

 22 



