14 PROCEEDINGS OF THE XATIOXAL, MUSEUM, vol.61. 



oval, white, with a narrow dark margin apically, almost none else- 

 where. At the apex there are five or six long bristles arising from 

 prolongations of the lamellae. 



Coxae and femora black, hind femora not ciliated; the knees and 

 tibiae light yellow; hind tibiae infuscated for about one-third their 

 length. Front and middle tarsi plain, light yellow at base. 



Wings hyaline, costa not thickened; shape of the wing is very 

 peculiar, the costal margin being much straighter than usual about 

 to the point where the third longitudinal vein joins it. From this 

 point it curves backward and the posterior margin has a broad uni- 

 form curve, the anal angle being very little developed. The fourth 

 vein beyond the cross vein bends strongly forward and continues in 

 that direction to the margin so that its tip is considerably before 

 the apex of the wing. It is however parallel with the third vein. 



Length 3.6 nmi. 



Described from a single male specimen from Florida, labeled 

 " Fla." 



Type.— Male, Cat. No. 25196, U.S.X.M. 



Runs to couplet 30, page 14, in the table of Bulletin 116, but 

 differs from all three species in having the costa almost straight. 



DOLICHOPUS ABRUPTUS, new speciea. 



Ma2e. — Front steel blue; face pale golden yellow, rather narrow 

 below ; palpi yellow ; antennae wholly black, of moderate length ; the 

 arista plain; orbital cilia white except on the upper third. Meso- 

 notum and scutellum dark steel blue; pleurae green with thin gray 

 dust; calypters with black cilia. Abdomen green; the incisures 

 black; Hypopygium black, rather small; the lamellae ending in a 

 very sharp point, the narrow black border entire and not very hairy. 

 Legs yellow; the front coxae considerably infuscated on the basal 

 third ; middle and hind coxae black except tips ; the hind femora and 

 tibiae infuscated on the apical fourth. Front tarsi one and one-fourth 

 times as long as their tibiae; the basal joint about as long as the 

 four following, yellow; second joint about one-half as long, also 

 yellow; the remaining joints black, the third becoming flattened 

 toward the apex, the fourth and fifth distinctly flattened laterally 

 but not fringed. Middle femora having a very slight tinge of brown 

 at the apex; middle tibiae rather whitish, their tarsi infuscated from 

 the tip of the first joint; hind tarsi entirely black; pulvilli small. 

 Wing subhyaline, rather broad on the apical half; the anal angle 

 however conspicuously narrowed; costa not thickened at tip of first 

 vein. 



Length 3.9 mm. 



One male, Lake Tear, Essex County, New York. Collector un- 

 known. Received from M. C. Van Duzee. 



