DOLICHOPUS. 29 



DESCRIPTION OF THE SPECIES. 



I. PREVAILING COLOR or THE FEET BLACK. 

 A. Cilia of the inferior orbit black. 



1. D. gratus LOEW. % . Ex viridi chalybeus, pedum nigrorum tibiis 

 anterioribus totis tibiarumque posticarum dimidio basali flavis, facie 

 ochracea, ciliis oculorum inferioribus tegularumque ciliis nigriis. 



Bluish-green, feet black, the four anterior tibiae entirely, the two hind 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 grains LOEW, Neue Beitrage, VIII, 11, 1. 



Bluish-green. The narrow face ochre-brownish. Antennae 

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

 The cilia of the inferior orbit black. Lamellae of the hypopygium 

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

 a moderately broad black border ; 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 tibiae and tarsi yellowish, the latter ones 

 but little darker towards the tip ; hind tibiae 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. Tegulse 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. 



Hob. Trenton Falls, West Point, Palisades, etc., K Y. (Os- 

 ten-Sacken.) 



2. D. laticornis LOEW. $ . Viridis pedum nigrorum tibiis, excepto 

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

 tegularum ciliis albis. 



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



