March, igii.] FeLT : GENERIC SYNOPSIS OF ItONID.E. 57 



Genus ARTHROCNODAX Riibs. 1895, type A. vitis Riibs. 

 Antennal segments 14, the flagellate binodose ; palpi quadriarticu- 

 late ; ovipositor short, easily recognized by the third vein uniting with 

 costa well before the apex. Europe, North America. 



Genus MICRODIPLOSIS Tav. 1908, type M. zambezensis Tav. 

 Venation nearly as in the preceding genus except for the simple 

 fifth vein; flagellate antennal segments binodose; palpi quadriarticu- 

 late ; ventral plate rather long, greatly expanded subapically, broadly 

 and roundly emarginate ; ovipositor short. Africa. 



Genus HORMOMYIA H. Lw. 1850, type Cecidomyia crassipes H. Lw. 



Antennal segments 14 to over 20, the flagellate, binodose in the 

 male, the circumfili with short loops. Palpi uni- to triarticulate. 

 Large species, easily recognized by the mesonotum being greatly 

 produced over the head. Europe, North America. 



Genus PUTONIELLA Kieff. 1896, type Diplosis marsupialis F. Lw. 



Flagellate antennal segments of the male nearly trinodose ; cir- 

 cumfili only moderately developed; palpi triarticulate, the pulvilli one 

 fourth longer than the simple claws; ovipositor short, broadly rounded. 

 Europe. 



Genus ATRICHOSEMA Kieff. 1904, type A. aceris Kieff. 

 Antennal segments 14, the flagellate subsessile; palpi triarticulate; 

 ovipositor short ; pulvilli longer than the claws. Provisionally asso- 

 ciated with the preceding. Europe. 



Genus PSEUDHORMOMYIA Kieff. 1897, type P. granifex Kieff. 

 Separated from Hormomyia by the mesonotum not being pro- 

 duced over the head. Antennae in the male characteristic of the 

 typical Hormomyia. Flagellate antennal segments of the female with 

 three well developed circumfili ; palpi tri- or possibly quadriarticu- 

 late ; ovipositor long. Europe. 



Genus AMAUROSIPHON Rubs. 1910. 

 Erected without a description or reference thereto of a species and 

 separated from the preceding genus by the terminal clasp segment of 

 the male being thickened, club-shaped and the third and fourth an- 

 tennal segments fused. It may be cogeneric with the preceding. 

 Europe. 



