ART. 23 TWO-WINGED DOLICHOPODID FLIES VAN DUZEE 29 



Wings grayish; third vein bent backward a little at tip; last sec- 

 tion of fourth vein quite abruptly bent before its middle, parallel 

 with third at tip, ending in the apex of the wing; last section of 

 fifth vein more than twice as long as the cross vein. 



Female. — Face and front wide, wholly silvery white. Antennae 

 black; third joint about as long as wide, somewhat round in outline, 

 still the tip is pointed; arista nearly twice as long as the antenna. 

 Thorax shining green, with abundant silvery white pollen on front 

 and along the sides, extending to the scutellum, which is also 

 dulled with white pollen; pleurae more black, with silvery white 

 pollen, its posterior edge narrowly and obscurely yellowish. Abdo- 

 men black ; second and third segments yellow, with narrow hind mar- 

 gins of black, each segment with a conspicuous spot of silvery white 

 pollen on each side at base. Fore coxae yellow, with a blackish spot 

 at base on outer surface ; middle and hind coxae largely black. Hind 

 femora a little blackened at extreme tip above ; hind tibiae black at 

 tip for nearly one-fourth their length ; still, the black is not sharply 

 defined, but shades into the yellow. Hind tarsi wholly black; fore 

 and middle tarsi onl}' a little darkened toward their tips. 



Described from three males and two females; two males (one is 

 the type, in the Boston Society of Natural History) were taken at 

 Machias, Maine, July 22, and one raale at Brookline, Massachusetts, 

 I^Iay 23 ; these were taken by C. W. Johnson. The two females were 

 taken in Quebec by C. H. Curran, one the allotype (in Canadian 

 National Collection) at Hull, June 6, 1923, and the other at Rigaud, 

 June 26, 1906. 

 Paratype.—M2lQ, Cat. No. 27047, U.S.N.M., from Machias, Maine. 



23. ARGYRA CALCEATA Loew 



Argyra calceata Loew, Smiths. Misc. Coll., No. 171, p. 131, 1864. 



Third antennal joint about twice as long as wide, rounded at tip, 

 the first joint with about three hairs above near the tip ; hypopgium 

 with its outer lamellae somewhat triangular, quite pointed at tip, 

 blackish ; there are two pairs of inner appendages, the outer pair the 

 largest, broadly rounded and with two minute bristles at tip. Joints 

 of fore tarsi as 49-17-9-7-7; those of middle tarsi as 57-31-15-9-7; 

 hind tarsi wholly black, or nearly so, the joints as 38-43-23-14-8. 



This was described from " Middle States." I have seen it from 

 the following locations: Philadelphia, Pennsylvania; Lafayette, 

 Indiana, July 27; Erie County, New York, July 3 to September 3; 

 Summit County, Ohio; Auburndale, Massachusetts, August 28; 

 Cornish, New Hampshire, July 13 ; Mount Ascutney, Vermont, July 

 11, at 2,000 feet elevation; Bar Harbor, Maine, July 19; Emsdale, 

 Ontario, July 30. 



