F0LICH0PUS. 29 



DESCRIPTION OF THE SPECIES. 



I. Prevailing color of the feet black. 



A. Cilia of the inferior orbit black. 



1. D. gratllS Loew. % . — Ex viridi chalybeus, pedum nigrorum tibiia 

 anterioribus totis tibiaruinque posticarurn diniidio basali flavis, facie 

 ochracea, ciliis oculorum inferioribus tegularumque ciliis uigriis. 



Bluish-green, feet black, the four anterior tibia? entirely, the two land ones 

 upon the basal half yellow; face ochre-brownish; cilia of the inferior 

 orbit and of the tegulae black. Long. corp. 0.23 — 0.24. Long. al. 0.21. 



Syn. Dolichopus rjratus Loew, Neue Beitriige, VIII, 11, 1. 



Bluish-green. The narrow face ochre-brownish. Antenna? 

 black ; the first joint rather narrow. Front metallic bluish-green. 

 The cilia of the inferior orbit black. Lamella? of the hypopygium 

 whitish, of moderate size, on the upper and the apical margin with 

 a moderately broad black bonier; the apical margin somewhat 

 jagged and fringed with numerous black bristles. Femora black, 

 with yellow tip ; the hind femora rather stout, provided with a 

 bristle before the tip ; upon the under side ciliated with long black 

 hair; the four anterior tibia? and tarsi yellowish, the latter ones 

 but little darker towards the tip ; hind tibia? somewhat thickened, 

 the apical half and the whole of their hind side black, the remain- 

 ing parts yellowish ; hind tarsi quite black, the first joint with few 

 bristles. -Tegula? with strong black cilia. Wings hyaline, the 

 costa is thickened before the tip of the first longitudinal vein, and 

 only very gradually attenuated beyond ; the end of the fourth lon- 

 gitudinal vein converges towards the third. 



Hab. Trenton Falls, West Point, Palisades, etc., N. Y. (Os- 

 ten-Sacken.) 



2. D. laticornis Loew. % . — Viridia pedum nigrorum tibiis, excepto 

 posticarum apice, flavis, facie alba, ciliis oculorum inferioribus nigris, 

 tegularum ciliis albis. 



Green, feet black; tibioe, excepting the tip of the hind ones, yellow; face 



