ART. 23 TWO-WIXGED DOLICHOPODID FLIES VAX DUZEE 25 



long as second and third antennal joints taken together. The black 

 upper orbital cilia do not reach down to the middle of the eye; 

 beard snow white. 



Dorsum of thorax green, anterior half with considerable white 

 pollen; pleurae wholly blackish with white pollen, its posterior 

 edge not at all yellow ; scutellum with four marginal bristles, with- 

 out hairs on the disk. Abdomen dark metallic coppery; second 

 and third segments yellow, except narrow hind margins and a 

 vrider median line, which are of a blackish-coppery color; fourth 

 segment with a yellowish spot on each side; hairs of the abdomen 

 wholly black. Hypopj^gium and its appendages wholly black, the 

 former with numerous long, black, bristly hairs on posterior sur- 

 face; outer lamellae small, acute, triangular. 



Fore coxae pale yellow, covered with silvery white pollen, their 

 anterior surface with a few minute black hairs and several long 

 slender bristles near the tip ; middle and hind coxae black, narrowly 

 yellow at tip. Femora and tibiae yellow, tips of posterior tibiae 

 narrowdy but sharply black. Fore femora with a few long black 

 hairs on upper posterior surface of apical Ralf, otherwise the hairs 

 on all femora are short and black. Fore and middle tarsi blackened 

 from the tip of the first joint, hind tarsi wholly black; joints of 

 fore tarsi as 45-18-12-8-8; of middle pair as 55-25-16-9-8; those 

 of hind tarsi as 39-34—23-13-11. Calypters and halteres yellow, the 

 former with a small brown spot at tip and whitish cilia. 



Wings grayish; third vein only a little bent back at tip; last 

 section of fourth vein bent just beyond its basal third, parallel with 

 third beyond this bend; last section of fifth vein twice as long as 

 the cross vein. 



Female. — Face wide, its sides parallel, silvery white, the suture 

 near the third fifth, making the upper portion longer than the 

 lower part. First antennal joint slightjy longer than the second and 

 third taken together; arista a little longer than the antenna; palpi 

 and front black, quite thickly covered with white pollen. Coxae, 

 femora, tibiae, and tarsi colored as in the male, black hairs on the 

 fore coxae about as in the male. 



Abdomen shining green or coppery, it-s sides with white pollen; 

 second abdominal segment with quite large and distinct yellow spots 

 on each side. 



Described from eleven males and twelve females, taken at Hull, 

 Quebec, June 6-15, 1923; one female taken at Orillia, Ontario, July 

 15 ; and one female taken at Seabright, Ontario, July 16. All taken 

 by C. H. Curran. 



Paratypes. — Male and female. Cat. No. 27044, U.S.N.M. 



