ART.n CHIteTSOTOXINE SYEPHID-FLIES SHANNON 15 



fore and hind margins; genitalia unusually modified, the cerci bear- 

 ing a dense tuft of pile; two dense tufts of reddish pile projecting 

 inwardly from between the bases of the styles; the styles asym- 

 metrical, the right-hand one rather short with two apical rounded 

 projections, the left-hand one much longer and convoluted; wings 

 without dark anterior border; length, 15 mm.; wing, 13 mm. One 

 male. 



Type locality. — Uen Chaun Shien, Szechuen, China, August 7, 

 1924 (D. C.Graham). 



7^2/^^e.— Male, Cat. No. 28316, U.S.N.M. 



CHRYSOTOXUM FRATELLUM, new species 



Male and female. — Differs from tuherculatum chiefly in its smaller 

 size; legs entirely yellow; no spur on hind coxa, but with a tuft 

 of short, stiff black hairs present instead (both sexes) ; apical corners 

 of tergites very little produced ; length, 12 mm. ; wing, 11 mm. 



Genitalia of male normal, the styles symmetrical. 



Two males, one female. 



Type locality.— West of Chetu Pass, near Tatsienlu, 13,000-14,500 

 feet, Szechuen, China (D. C. Graham). 



Type.— Male, Cat. No. 28317, U.S.N.M. 



Allotype. — Female ; paratype, male. 



CHRYSOTOXUM MONGOL, new species 



Female. — Antennal joints 1:1: 2.25 ; arista yellowish, a little 

 longer than basal joints; face straight to the tubercular prominence, 

 thence protruding; mesonotal pile mainly black; pteropleura black 

 pilose; sternopleura with yellow spot; femora dark brown basally; 

 abdominal side margins only beaded, black save at apical corners 

 of tergites, which are moderately projecting; arcuate, strongly 

 curved, separated from side margins, bands narrow, the second and 

 third subinterrupted ; second sternite entirely black ; third with yel- 

 low band on anterior border ; fourth with pair elongate yellow spots 

 close to anterior border ; margins of fifth tergite 3:1: 1.25 ; anterior 

 border of wing rather narrowly clouded; length, 15 mm.; wing, 13 

 mm. One female. 



Type locality. — Yellow Dragon Gorge near Songpan, 12,000- 

 14,000 feet, Szechuen, China, 1924 (D. C. Graham). 



T^y^e.— Female, Cat. No. 28318, U.S.N.M. 



CHRYSOTOXUM DRACO, new species 



Male. — A very robust and unusually marked species in which the 

 yellow greatly predominates. Eyes bare; the black markings on 

 the face and front have practically disappeared, only an obscure 



