DOLICIIOPUS. 53 



albidis, tegularum ciliis nigris, pedibus flavis, alarum vena longitudinali 

 quarta append iculaUi. 



Dark bronze-green, upper side of the thorax bronze-black ; face white ; an- 

 tennae black ; cilia of the lower orbit whitish ; cilia of the tegulae yel- 

 lowish ; the fourth longitudinal vein with a stump of a vein. Long, 

 corp. 0.13. Long. al. 0.13. 



Syx. Dolichopus rumifer Loew, Neue Beitr. VIII, 19, 16. 



Dark bronze-green, the upper side of the thorax more bronze- 

 black. Face of the g nearly as broad as that of the 9, in both 

 sexes white. Antennae black; the lower corner of the first joint 

 colored somewhat lighter ; in the g the third joint is rather long 

 elliptic with a pointed tip, and the apparently bare arista inserted 

 quite near the tip ; in the ? it is perceptibly shorter, and has a 

 less pointed tip, to which the arista is still more approximated. 

 Front bluisUfolack, very bright. Cilia of the inferior orbit 

 whitish. Upper side of the thorax bronze-black, or more dark 

 bronze-green. Abdomen somewhat coppery. Fore coxae dark 

 yellow, at the extreme basis somewhat blackened, beset upon the 

 fore side with short minute black hairs. Middle and hind coxae 

 blackish, dark yellow only at the tip. Feet dark yellow ; the fore 

 and middle tarsi from the tip of the second joint black ; the hind 

 tarsi, including the tip of the hind tibiae, black. The hind femora 

 somewhat broad, before the end with a bristle. Cilia of the tegulae 

 black. Wings hyaline-gray ; the fourth longitudinal vein broken, 

 so that its inferior angle is a right one and the superior is rounded, 

 the former is supplied with a rather long stump of a vein. 



Male. Lamellae of the hypopygium white, rather small, round- 

 ish, at the upper and apical margin only with an extremely nar- 

 row dark border, on the latter but very little jagged and fringed 

 with black bristles. Hind femora very sparsely ciliated with 

 moderately long whitish-yellow hairs. Hind femora rather stout, 

 the greater part of their hind side glabrous. Costa with a small 

 swelling at the tip of the first longitudinal vein. 



Hab. Nebraska. (Dr. Hayden.) Lake Winnipeg. (Kennicott.) 

 New Rochelle, X. Y. (Osten-Sacken.) 



b. Antennas yellowish-red. 



24. D. toifractllS Loew. £ and £• — Aeneo-viridis, thoracis dorso 

 pollinoso, opaco, abdomine cupreo-micante, facie albida, interdum ex 

 flavo ciuerea, antennis rutis, ciliis oculorum inferioribus albidis, ciliis 

 tegularum nigris, alarum vena, longitudinali quarts appendicular. 



