146 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



others, narrowly black at tip. Fore tarsi a little longer tlian tlieir 

 tibiae, black from the tip of the first joint, which is as long as the 

 remaining four joints taken together, second joint scarcely longer 

 than the third, fifth shorter than third but longer than fourth, last 

 four joints very slightly compressed. Middle tarsi about one and a 

 third times as long as their tibiae, black from the tip of the fu-st 

 joint, which has two bristles on upper edge, one at basal fourth and 

 one at basal third. Calypters yellow with black cilia; halteres yellow 

 with their stem brownish. 



Wings (fig. 98a) grayish; costa rather thick beyond the tip of first 

 vein but without an enlargement; last section of fourth vein with a 

 small but rather abrupt bend near its middle; hind margin of wing 

 scarcely indented at tip of fifth vein, rather evenly rounded, the anal 

 angle being poorly developed. 



Described from 1 male taken by me on Grand Island, New York, 

 August 17, 1913. 



Type.— Male, Cat. No. 23026, U.S.N.M. 



This may prove to be the male of hrunneus Aldrich, it differs from 

 the type of that species (which was described from a single female) 

 in having the color of thorax and abdomen decidedly green, not 

 bronze brown as in hrunneus; the bend in the last section of fourth vein 

 is sharper in this male and slightly nearer its middle, and the middle 

 basitarsi have two bristles on upper edge (there is only one on one 

 basitarsus in the type, but one may have been broken off) in this 

 species, while in hrunneus there is none. The middle tibiae in both 

 forms have one bristle below. 



The name was suggested by the small hypopygium which reminded 

 me of a rabbit's tail. * 



No. 99. DOLICHOPUS BRUNNEUS Aldrich. 



Dolichopus hrunneus Aldrich, Kansas Univ. Quart., vol. 2, p. 14, 1893. 



Female. — Length 3 mm.; of wing 2.8 mm. Face broad, with 

 grayish white pollen which is slightly tinged with yellow near the 

 antennae. Front dark green, somewhat shining. Antennae wholly 

 black; third joint scarcely longer than wide, somewhat pointed at 

 tip. Lower orbital cilia pale. 



Thorax and abdomen bronze-brown; dorsum of thorax a little 

 dulled with brown pollen; pleurae more black with white pollen. 



Fore coxae yellow, blackened at base on outer surface, the black 

 not sharply limited but shading into the yellow; anterior surface 

 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. Posterior tibiae blackish at tip, slightly 

 thicker than the others. Middle tibiae with one bristle below. Fore 

 tarsi about as long as their tibiae, black from the tip of the first 



