— 303 



VsDEunnïRED Crase-Flies in tue Pinis Muséum [Tipviadv., Dipteha): 



Part III , 



BY Charles P. Alexander. 

 Ph. D., Urbana, III., U. S. A. 



The j)i-es(Mit report is a conlinnalion of the two preceding papers nnder 

 lliis goneral tille. Tlie species (Jiscussed at lliis time are largoly IVoni Cliina 

 aiid Mougolia wliere they were collected by J)r. Vaillant, \)i\ du Cliazaud, 

 l'ère David and Père Cavalerie. Tlie discovery of the female sex ol Ihe 

 Alaskan Ornitkodes harrimani Co(|uillett is of exceptional interest. The 

 writer would express lus tlianks to Dr. Bouvier and Mons. Sdguy for their 

 conlinued interest in tlie progj'ess of tbis report. 



OLD WORLD SPECIES. 



surfamily liiti!\obii!\ae* 



Tribe eriopterini. 



GeNDS Erioptera Meîgen. 



Erioptera (Acyphona) gobiensis nov. sp. 



General coloi'ation lighl grey ; latéral margins of praescutum yellow; 

 pleura yellowish, variegated wîth grey; wiiigs yeilowish subhyaline, the 

 wvà indistinctly seanied with'darker; celi i st jl/oclosed, oi' opon by alro- 

 pby of outer detlection of M3; anal veins divergent, abdominal segments 

 annulated brown and obscure yellow. 



Maie. — Length about 5 mm.; wing, 5-5.9 mm. 



Ffimale. — Length 6 mm.; wing, 6-6.5 mm. 



Rostrnm very small; palpi short, brown, the basai segments yeilowish. 

 Antennae dark brown, th(^ apex of tlie lirst segment yeilowish ; second sca- 

 ])al segment large, widened distally; flagellar segments short, crowded. 

 Head grey, very narrowly and indistinctly paler adjoining the inner margin 



of eyes. 



