GYMNOPTEENUS. 87 



the pulvilli also larger than usual. The middle and the hind 

 tarsi strongly infuscated from the tip of the first joint, towards 

 the tip black. Cilia of the tegulce black. Wings tinged with 

 blackish-gray. 



Hab. Middle States. (Osten-Sacken.) 



Observation. A single female specimen agrees with the just 

 described male of G. subdilatatus in the color of the coxae, and 

 cannot therefore belong to any of the other species known to me ; 

 I am prevented, however, from taking it for the 9 of G. subdila- 

 tatus on account of the more clumsy shape of the feet. 



1O. Cr. laevigatlis LOEW. % . Viridis, thorace subcserulescente, niti- 

 dissimo, antennis parvis nigris, articulo secundo et tertii basi obscure 

 rafis, coxis anticis totis pedibusque pallide flavis, tarsis posticis inde 

 ab articuli prinri apice nigris, lamellis hypopygii pallide flavis, appendi- 

 cibus interioribus siruplicibus. 



Green, with, a somewhat violet, very bright thorax ; the small antennae 

 black, the second joint and the root of the third dusky red ; the whole 

 fore coxe and the feet yellow, the hind tarsi from the tip of the first 

 joint black ; the lamellae of the hypopygium pale-yellow ; the interior 

 appendages simple. Long. corp. 0.12. Long. al. 0.12. 



SYN. Gymnopternus lasvigatus LOEW, Neue Beitr. VIII, 31, 9. 



Green, bright. Fa.ce and front covered with whitish dust. An- 

 tennae small, black ; the second joint and the root of the third 

 dusky red. Arista with a short but distinct pubescence. The 

 cilia of the inferior orbit seem to be black. Upper side of the 

 thorax bluish-green and very bright. Upon the surface of the 

 scutellum, besides the usual bristles, there are a few quite imper- 

 ceptible little hairs. The small lamella? of the hypopygium are 

 light-yellowish, with a scarcely perceptible blackish border and 

 crescent shaped. Coxae and feet white-yellowish ; the middle coxae 

 on the outside almost as far as the tip, and the hind coxae at the 

 root, blackened. The hairs on the feet are somewhat coarse, and 

 the usual row of bristles on the upper side of the fore tibiae con- 

 sists of comparatively long and rather strong bristles. Hind tarsi 

 black from the tip of the first joint ; fore and middle tarsi infus- 

 cated from the same joint. Cilia of the tegula? black ; wings 

 tinged with blackish-gray ; the end of the third and fourth longi- 

 tudinal veins parallel. 



Hab. Middle States. 



