3 20 Psyche [June 



NOTES AND DESCEIPTIONS OF A FEW NORTH 

 AMEEICAN DOLICHOPODID.E (DIPTEEA). 



By M. C. Van Duzee 



Buffalo, N. Y. 



Diaphorus hirsutus ^-g. nov. 



]\Iale: Length 4-4.5 mm.; of wing 4 mm. Face narrow, sil- 

 very white. Palpi yellow, prol)oscis lu'ownish. Front nearly 

 opaque with grey pollen, the ocular tu1)U]'cul more blackish ; ocullar 

 bristles long, a bristle close to the orint on each side curves for- 

 ward. Antennge black; first joint long, hairy above; second joint 

 large with rather long bristles at tip; third snurll, not as large as 

 second, rounded at tip; arista basal, long, pubescent. Lateral and 

 inferior orlntal cilia whitish, five or six of the upper cilia on each 

 side black. 



Thorax nearly opaque with brown })ollen, the median line on 

 the dorsum and the scutellum green, quite shining; acrostichal 

 bristles small, in a single row; six large dorsocentral bristles on 

 each side; scutellum with four large bristles on its margin; pleur;e 

 more blackish with gray pollen, its posterior edge yellow. Abdo- 

 men yellow with the posterior edge of first segment, large triangles 

 on the dorsum of second, third and fourth, which nearly reach the 

 preceding segment on the median line and the sides on the pos- 

 terior margin of the segments, and nearly the whole of fifth and 

 sixth segments, shining green or bronze; hairs on the dorsum 

 rather long, especially near the base of the abdomen, those on the 

 sides of the abdomen yellowish. Hypopygium rather conspicuous, 

 blackish, still more or less yellow towards the ventral point ; its 

 appendages small brownish lamella?, it has about four rather long 

 and conspicuous, although not very stout bristles at tip. 



Coxse yellow^; middle pair with a blackish streak on outer side; 

 fore and middle pairs with black bristles on the apical half of 

 their anterior surface. Femora and tibia? yellow, very hairy; fore 

 femora with a few slender l)ristles on tlie apical ])art of the lower 

 posterior edge, which are as long as the width of the femora ; })os- 

 terior femora infuscated on apical half of upper surface, and tlie 

 slender hairs of their lower surface as long as the width of th»i 

 femora; bristles on upper surface of the tibiae small and incon- 



