GYMNOPTERNUS. 81 



roughly hairy, with a subapical arista. Long. corp. 0.13 0.14. Long, 

 al. 0.16. 



SYX. Gymnopternus subulatus LOEW, .Neue Beitr. VIII, 29, 2. 



Green, made dull by pale gray-brownish dust, especially upon 

 the thorax. Face gray-whitish. The first joint of the antennae 

 black-brown, the second red, the third dark brownj at the root 

 red, unusually long and sharply pointed, and covered with much 

 longer hairs than is the case with the other species of the same 

 genus. The black arista has a hardly perceptible pubescence, 

 is scarcely somewhat longer than the third joint of the antennae, 

 and is inserted about its last third, so as to be nearer to the tip 

 than is the case with the other species. Front, in consequence 

 of a thick covering of dust, dull greenish-gray. The color of 

 the cilia of the inferior orbit cannot easily be recognized, how- 

 ever only the lowest of them may possibly be of a pale color. 

 Thorax and scutellum, on account of a thick covering of dust, 

 pretty dull gray-green; the scutellum bears, as usual, the two black 

 bristles, and seems otherwise to be entirely without hairs. Abdo- 

 men more green, and brighter than the thorax. The black hypo- 

 pygium rather stout, with small yellowish lamellae, which are cili- 

 ated on the margin with short black hairs and have no dark edge. 

 Interior appendages simple, provided with one hair upon the upper 

 side and with two hairs upon the point, before it is bent down. 

 Coxae and feet pale yellowish, fore coxae with black hair. Cilia 

 of the tegulae black. Wings somewhat yellow-grayish, large and 

 broad, especially towards the tip ; the anal angle rounded off. 



Hab. Trenton Falls, N. Y. (Osten Sacken.) 



B. THIRD JOINT OP THE ANTENNA WITHOUT ELONGATED POINT. 

 A. Prevailing color of the feet black. 



3. G. scotias LOEW. and 9 . Atro-virens, pedibus nigris, trochan- 

 tenbus, genibus, tibiis, tarsorumque anteriorum basi flavicantibus, tertio 

 antennarum articulo hirto, facie non pilosa. ' 



Black-green, feet black ; trochanters, knees, tibise, root of the four anterior 

 tarsi yellowish, the third joint of the antennae roughly hairy, face not 

 hairy. Long. corp. 0.130.14. Long. al. 0.140.15. 



SYN. Gymnopternus scotias LOEW, Neue Beitr. VIII, 29, 3. 



Dark black-green, or almost metallic black. Face and front 

 gray. Antennae entirely black, the third joint elongated, ovate, 

 6 



