SUPPLEMENT. 661 



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

 hind tibiae of the female are indistinctly infuscatcd at the. tip ; those 

 of the male are distinctly infnscated or even blackened, especially 

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

 tinged with blackish-gray. 



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



29. Cr. exiguiis, nov. sp. % . — iEneus, nitens, antennis nigris, facie 

 ochracea, coxis anticis totis, pedibus laniellisque hypopygii flavis. 



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



fore coxae, the feet, and the lamellae of the hypopygiurn 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 hypopygiurn 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. PEEASTONEURUS. 



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 Loeio. 

 such white spot on the posterior margin of the thorax. 3 



3 f Wings blackened. 2 lugubris Loeiv. 



I Wings tinged with blackish-gray. f 4 



(Fore coxa? altogether yellow ; lamellae of the hypopygiurn long. 

 3 laetus Loew. 

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

 ,. J Only the basis of the fore coxae blackened. 6 lamellatus Loew. 



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



Fore coxae blackened at the basis. 4 vagans Loew. 



''ore coxae entirely yellow. 7 



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



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

 8 alternans Loew. 

 22 



/-Al] 



I No 



(Fc 

 iFc 



