DESCRIPTION OF THE SPECIES. 31 



is of the same color; its tip and the remaining joints are black. 

 The hind tibia? are black ; upon their upper side, from the base 

 beyon'd the middle, clayish-yellow ; towards their tip but little 

 thickened ; the first joint of the hind tarsi is covered with many 

 thorn-like bristles. Tegula? with whitish cilia. Wings entirely 

 hyaline, towards the base somewhat wedge-shaped, with a black 

 spot which occupies their very tip. The costa is hardly thickened 

 near the tip of the first longitudinal vein ; the end of the fourth 

 longitudinal vein converges towards the third. 



Eab. District Columbia ; Trenton Falls, 1ST. Y. (Osteu-Sacken.) 



4. D. altoiciliatlis LOEW. 9 Obscure viridis, peduin nigrorum 

 tibiis, posticarum apice tarnen excepto, tarsorumque anteriorum basi 

 flavis, facie alba, ciliis oculorum iuferioribus albis, tegularum ciliis 

 nigris. 



Dark green ; feet black, tibise, excepting the tip of the hind ones, and the 

 basis of the four anterior tarsi, yellow ; face white ; cilia of the inferior 

 orbit white ; cilia of the tegulse black. Long. corp. 0.20. Long. al. 0.20. 



SYN. Dolichopus albidliatus LOEW, Berl. Ent. Monatschr. VI, 211, 59. 



Dark green. Face proportionally rather broad, white. An- 

 tennas black, third joint short. Front metallic green. Cilia on 

 the inferior orbit white. Femora black, with a greenish reflection, 

 their extreme tip brownish-yellow ; on the under side of the hind 

 femora the hairs are somewhat longer than in the related species, 

 and of such a kind as to lead to the supposition that the male has 

 the hind femora ciliated with black. Tibia? yellow, the tip of the 

 hind ones black ; this black coloring occupies on the anterior side 

 perhaps the fourth, on the hind side nearly the third part. On 

 the four anterior tarsi the four last joints, including the tip of the 

 first joint, are black ; the hind tarsi are entirely black ; their first 

 joint is as long as the second, upon its upper side with two bris- 

 tles, and upon its under side with one. Cilia of the tegula? black. 

 Wings hyaline. 



Hob. Illinois. (Le Baron.) 



5. D. xantliocnemus, n. sp. and 9- Obscure viridis, pedum 

 nigrorum tibiis, posticarum apice taruen excepto, tarsorumque anteriorum 

 basi flavi^, facie alM, ciliis oculorum inferioribus albis, tegularum ciliis 

 nigris, fernoribus maris posticis albo-ciliatis. 



Dark green ; feet black, tibiee, excepting the tip of the hind ones, and the 



