March, I9II.] FeLT : GeNERIC SyNOPSIS OF Itonid.e. 47 



Genus PSECTROSEMA Kieff. 1904, type P. tamarids D. Stef. 

 With the characters of Rhopalomyia except that the lateral lobes 

 of the pulvilli are longer than the median one. Europe. 



Genus SACKENOMYIA Felt 1908, type Oiigotrophus acerifolius Felt. 



Antennal segments 12 to over 20, the flagellate ones subsessile or 

 sessile; palpi biarticulate. Distinguished from allied forms by the 

 short ovipositor of the female, the terminal portion chitinous, cultri- 

 form. North America. 



Genus WALSHOMYIA Felt 1908, type W. juniperina Felt. 

 Antennal segments 18 or 19, the flagellate ones of the male 

 stemmed; palpi uniarticulate; ovipositor of the female short, trian- 

 gular, the terminal clasp segment of the male distinctly produced, not 

 fusiform. North America. 



Tribe ASPHONDYLIARI^. 

 Large, mostly heavy bodied insects with long, cylindric, sessile 

 antennal segments, the latter without whorls of long hairs ; claws 

 simple. One group of genera is peculiar for the most part because 

 of the great reduction in the palpal segments and the highly special- 

 ized, aciculate ovipositor. The other group shows no reduction in 

 the palpi but a high degree of specialization in the circumfili and rela- 

 tively small modification of the ovipositor. The species live mostly 

 in bud or leaf galls. 



Genus ZALEPIDOTA Riibs. 1908, type Z. piperis Rubs. 

 Palpi uniarticulate, legs and wings thickly scaled; the third vein 

 unites with costa at the apex of the wing, the subcostal cell being 

 remarkably broad and with a rudimentary vein spur at its base. 

 South America. 



Genus BRUGGMANNIELLA Tav. 1909, type B. braziliensis Tav. 

 The subcostal cell is opaque, not remarkably broad and there is 

 no rudimentary vein spur at its base. The basal portion of the ovi- 

 positor is dilated apically. South America. 



Genus ASPHONDYLIA H. Lw. 1850, type Cecidomyia sarothamni H. Lw. 



Antennal segments 14, the flagellate sessile, cylindric, the distal 



ones in the female reduced; palpi uni- to triarticulate ; subcostal cell 



not opaque; terminal clasp segment of the male genitalia bidentate; 



