March, I9I1.] FeLT : GENERIC SYNOPSIS OF IxONID.E. 41 



Genus CAMPTOMYIA Kieff. 1894, type C. binotata Kieff. 

 Separated from the preceding genus by the slender abdomen, the 

 distal segments being recurved dorsally. Europe, North America. 



Genus DIRHIZA H. Lw. 1850, type Cecidomyia lateritia H. Lw. 

 Antennal segments 14, the fifth of the male having a stem one 

 fourth the length of the basal enlargement. Wing venation as in 

 Porricondyla. Separated from the two preceding genera by the anten- 

 nae not being greatly produced in both sexes. Europe, North America. 



Genus LOPEZIELLA Tav. 1908, type L. combreti Tav. 

 Antennal segments 14, the fifth with a length about four times its 

 diameter, distinctly constricted near the basal and distal thirds and 

 ornamented with sparse whorls of short setae. Ovipositor short, con- 

 ical ; venation as in Porricondyla. Separated from the three preced- 

 ing genera by the triarticulate palpi. Africa. 



Genus LOPESIA Tav. 1908, type L. parinarii Tav. 

 Venation as in Porricondyla. Antennal segments 14, binodose, 

 easily recognized by the long loops of the circumfili like those in the 

 Itonidinariae. South America. 



Genus ALLODIPLOSIS Kieff. & Jorg. 1910, type A. crassus 

 Kieff. & Jorg. 



Antennal segments 14, binodose, the circumfili scarcely reaching 

 the following node, easily separated from the preceding by the uniar- 

 ticulate palpi. South America. 



Genus HOLONEURUS Kieff. 1894, type Holoneura cincta Kiefif. 

 Venation as in Porricondyla except that the fifth vein is simple, 

 the sixth wanting. Antennal segments 12 to over 20. Synonym: 

 Holoneura Kieff. Europe, North America. 



Tribe LASIOPTERARI.E. 

 Members of this and the following tribes have no distinct cross- 

 vein imiting the third vein with subcosta. In this tribe costa is thickly 

 scaled and the third vein usually very close to the anterior margin of 

 the wing. Antennal segments sessile, cylindric, not produced. Claws 

 almost invariably toothed. Comprises a large number of usually 

 brown and white marked species living for the most part in stem 

 galls on woody or herbaceous plants or in the peculiar leaf blister galls. 



