386 NEW YORK STATE MUSEUM 



gg Terminal clasp segment slender, distinctly longer than the 



basal clasp segment Youngomyia n. g. 



(Type Dichrodiplosis podophyllae Felt) 



ggg Terminal clasp segment normal, not as above 



Alycodiplosis Rubs. 

 cc Claws simple 



d Distal flagellate antennal segments cylindric, stemmed, not binodose 



Prodiplosis n. g. 

 (Type Cecidomyia floricola Felt) 

 dd All flagellate segments binodose at least 



c Third vein uniting with costa well before the apex 



Arthrocnodax Rubs. 



ce Third vein uniting with costa at or beyond the apex of the wing 



/" Palpi triarticulate 



g Ventral plate or harpes conical, serrate. .Odontodiplosis n. g. 



(Type Cecidomyia karnerensis Felt) 



gg Ventral plate not serrate; basal clasp segment stout 



Adiplosis n. g. 

 (Type Cecidomyia toxicodendri Felt) 

 // Palpi quadriarticulate 



g Claws bent at right angles or nearly so 



h Ventral plate deeply and roundly emarginate, the dorsal 

 plate dilated, the lateral angles being strongly produced.. 



Hyperdiplosis n. g. 



(Type Cecidomyia lobata Felt) 



hh Ventral plate very long, slender, roundly emarginate, the 



dorsal plate not greatly dilated Giardomyia n. g. 



(Type Cecidomyia photophila Felt) 

 gg Claws not bent at right angles 



h Basal clasp segment conspicuously lobed or spined 

 i Basal clasp segment with one or more heavy, chitinous 



spines apically Metadiplosis n. g. 



(Type M . s p i n o. s a n. sp.) 

 it Basal clasp segment with a long, setose process apically 



Epidiplosis n. g. 

 (Type E. s a y i n. sp.) 

 Hi Basal clasp segment with a triangular lobe basally; ven- 

 tral plate scarcely longer than broad.. Lestodiplosis Kieff. 

 hh Basal clasp segment without conspicuous lobes or spines 

 i Dorsal and ventral plates short, broad, triangularly 

 emarginate; terminal clasp segment short, stout, the 



apex broad, serrate Paradiplosis n. g. 



(Type Cecidomyia obesa Felt) 

 ii Not as above 



y Dorsal plate divided, the lobes greatly produced and 



broadly rounded laterally Obolodiplosis n. g. 



(Type Cecidomyia orbiculata Felt) 

 /;■ Not as above 



k Ventral plate long, linear, narrowly rounded apically 



Clinodiplosis Kief¥. 

 kk Ventral plate not as above Cecidomyia Meig. 



