ART. 23 TWO-WINGED DOLICHOPODID FLIES VAN DUZEE 37 



rovv of stiff black hairs on lower anterior edge, which are not as long 

 as their width. All tibiae pale yellow, posterior pair with nearly 

 apical fourth black. Fore and middle tarsi yellow at base, black 

 from the tip of the first joint ; joints of anterior pair as 57-23-17-9-10 ; 

 joints of middle tarsi as 62-23-17-9-6; those of hind ones as 

 40-35-26-14r-13. Calypters pale yellow with broad black tips and 

 yellow cilia. Halteres yellow. 



Wings slightly tinged with yellowish -bro Avn ; third vein bent 

 backward at tip; last section of fourth vein bent before its middle, 

 parallel with third toward the tip ; last section of fifth vein one and a 

 third times as long as the cross vein. 



Described from two males, taken at Mount Washington, New 

 Hampshire, July 24, by C. W. Johnson. 



HoJotype. — In the author's collection. 



32. ARGYRA (LEUCOSTOLA) CINGULATA Loew 



Leucostola cingulata Loew, Neue Beitr., vol. 8, 1861, p. 53 ; Smiths. Misc. 

 Colls., No. 171, p. 157, 1864. 



Described from the District of Columbia. I have taken it in Erie 

 County, New York, June 16 and July 4. Nathan Banks took it at 

 Falls Church, Virginia, May 24 and July 19. Dr. J. M. Aldrich 

 took it at Lawrence, Kansas, and Lafayette, Indiana, June 5 and 

 July 13 ; and in his collection I found it from Opelousas, Louisiana, 

 taken by G. R. Pilate in May (fig. 28). 



33. ARGYRA (LEUCOSTOLA) JOHNSONI, new species 



Male. — Length, 4.5 mm. Face and front silvery white, the former 

 very narrow. Palpi yellow with silvery pollen. Proboscis brown. 

 Antennae black; first joint short, bare above; third joint longer than 

 the two basal joints taken together, obtuse at tip; arista inserted a 

 little above the tip, a little longer than the antenna. Lower orbital 

 cilia yellow, these scarcely reach to the middle of the eye, and I can 

 not see any black cilia above them. 



Dorsum of thorax dark but bright green, dulled a little with sil- 

 very white pollen, especially in front and on the lateral sides ; pleurae 

 more black with white pollen. Abdomen thickly covered with silvery 

 white pollen, its hairs black, those of the sides being yellow ; first 

 segment mostly black; second and third yellow with very narrow 

 hind margin of second and anterior and posterior margins of third 

 brown ; fourth black, still showing a slight yellowish color, especially 

 on the sides; apical segments black, the extreme apical edges of all 

 segments appear white. Hypopygium (fig. 29) black; its appendages 

 yellow; they consist of a pair of lamellae fringed with long hairs, a 



