THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 153 



hind margin of wing scarcely indented at tip of fifth vein but shghtly 

 bulging just before this point and very slightly hollowed between 

 there and the tip of sixth vein; anal angle not very prominent. 



Described from 1 male taken by H. S. Parish at Waubamic, Ontario, 

 July U, 1915. 



Type in the collection of A. L. Melander. It met with an accident 

 after the description was written and is in poor shape, the fore legs 

 being broken off. 



No, 105. DOLICHOPUS DECORUS, new species. 



Male. — Length 4.5 mm.; of wing 5 mm. Face wide, covered with 

 coarse gray pollen, which is tinged a little with yellow. Front shining 

 blue-green. Antennae black; lower half of first joint yellow; third 

 joint large, nearly twice as long as wide, nearly straight above, rounded 

 below, pointed at tip, arista inserted about the middle of the upper 

 edge. Lower orbital cilia yellowish white, about 10 of the upper 

 cilia on each side black. 



Thorax blue-green with bronze reflections which form three 

 poorly defined vittae on the fore part of the dorsum, which is covered 

 with yellowish gray pollen; pleurae dulled with gray pollen. Ab- 

 domen green with coppery reflections and narrow black incisures, 

 somewhat dulled with white poUen, which is no thicker on the sides 

 than on the upper surface. Hypopygium black, its lamellae large, 

 oval, jagged and bristly on apical margin, white with a narrow black 

 border on apical and upper margins, fringed on upper edge with 

 black hairs. 



Fore coxae yellow with a black spot at base on outer side, their 

 anterior surface covered with thin silvery pollen and with little black 

 hairs. Middle and hind coxae black with yellow tips. Femora and 

 tibiae yellow. Middle and hind femora each with one preapical 

 bristle, the latter cihated on apical half of the lower inner edge with 

 yellow hairs, the longest of which is scarcely as long as the width of 

 the femora. Posterior tibiae a little thickened, their tips black for 

 one-sixth their length; the glabrous stripe on upper surface between 

 the rows of large bristles distinct but not quite reaching their base, 

 basal third of inner surface also glabrous. Fore tarsi about one and 

 a third times as long as their tibiae, black from the tip of the first 

 joint, which is as long as the two following joints taken together; 

 middle tarsi a little longer than their tibiae, black from the tip of the 

 first joint, which has a large bristle above near apical fourth. Middle 

 tibiae with three bristles below, two near apical third and one at 

 basal third. Hind tarsi wholly black, one and a fourth times as long 

 as their tibiae. Calypters and halteres yellow, the former with black 

 cilia. 



