PAEACLIUS. ( .)7 



grayish dust. Scutcllum with a lew short hairs. Posterior mar- 

 gin of the pleurae yellow. Venter yellow. On the anterior seg- 

 ments of the abdomen the lateral margins are also colored with 

 yellow. Hypopygium of the usual shape. The small, delicate 

 lamellae yellowish, sparsely ciliated. Coxae and feet white-yellow- 

 ish. The fore cox* have upon their anterior side no black, but 

 throughout only extremely delicate small whitish hairs, so as to 

 appear glabrous, which constitutes a very striking character of 

 this species. The tarsi towards their end are scarcely somewhat 

 infuscated. 



Hab. Middle States. (Osten-Sacken.) 



23. G. ventralis Loew. % . — Viridis, inodice nitens, antennaruru 

 articulo tertio latiusculo, rotundato, pleuraruui margine postico, ventre, 

 coxis, pedibusque pallide flavis, hypopygio maris non incrassato. 



Green, moderately shining, third joint of the antennse rather broad, rounded ; 



posterior margin of the pleurse, venter, cox?e and feet pale-yellowish ; 



hypopygium not thickened. Long. corp. 0.13 — 0.14. Long. al. 0.15. 

 Syn. Gymnopternus ventralis Loew, Neue Beitr. VIII, 36, 22. 



Green, not very bright. Face with a whitish, front with a pale 

 yellow-grayish dust. Antenna? brownish-red, of moderate size: 

 the third joint, which is rounded, is rather broad ; arista with 

 a rather short but distinct pubescence. Cilia of the inferior 

 orbit black. Thorax quite dull on account of a yellow-grayish 

 dust. Scutellum with delicate but distinct hairs. The entire pos- 

 terior margin of the pleurae yellow. Tenter yellow. Hypopygium 

 i if the usual form. The small yellowish lamella? of middle size, 

 rather sparsely ciliated. Coxae and feet pale-yellowish. The 

 hairs on the anterior coxa? are partially blackish, but so delicate 

 that they might be easily overlooked. The tarsi towards their end 

 are only little infuscated. Cilia of the tegulae black. Wings 

 with a yellow-grayish tinge ; the third and fourth longitudinal 

 veins parallel towards their end. 



Hab. New York. 



(Jen. IV. PARACJLIUS. 



When I adopted, in the fifth part of the Neue Beitrage, the 



genus Gymnopternus, and distinguished it from the related 



genera, it was done merely upon the basis of an investigation of 



European species, so that I had only these species in view when 



1 



