— 306 — 



Head, rostrum and palpi dark. Antennea bicolorous. aboiit tlie basai 

 half of each flageilar segment dark brown, the apex conspiciiously yellovv. 



Thoiax dark, badly discoloring any possible pruiuosity. Haltères elon- 

 gate, yellow, tlie knobs brown. Legs witb tbe coxae and trochanters 

 brown; feniora and tibiae brovvnish yellow, ibe tips slightly darkened; 

 tarsi dark brown, the metataisi paler. ^\ings subliyaline with a brown 

 reticulate pattern of abimdant spots and dots, thèse séries of dots lying 

 along the veins and extending into the cells; centers of the cells washed 

 with pale brown ; the dots in the costal cell are darkcr and heavier; larger 

 J»rown spots at sligma, origin of Rs and at ends of veins Jh and Rh + û. 

 Venation : .Se long; Sc\ extending to just beyond midiength of /?s, Sc-j far 

 removed froni lip of Sc\ , opposite origin of Jis ; H\ and Hj, in punctiform 

 conctact at wing-margin ; a strong supernumerary crossvein in cell /?3 at 

 the bend of 7t3, the lalter almost in a line wilh ihis crossvein ; cell M-^ open 

 by the atrophy of the oiiter dellection of Afs; basai dellection of ('jV\ nearly 

 its own iength before the fork of M. 



Abdomen dark brown, the slernites paler brown. 



Habitat. — Mongolia (Gobi). 



Holotype, 9, Gha Tchéou à Kan Tch<^ou, Nan Ghan, versant nord , alti- 

 tude 1000-2000 meters, Jiine 1909 (Dr. L. Vaillant). 

 Type in the Gollection of the Paris Muséum. 



The only other species of Gonomi/ia known with a supernumerary cross- 

 vein in cell i?8 is G.jucunda Loew of Europe, a very différent fly. 



