78 NEW YORK STATE MUSEUM 



cc Circumfili nearly regular and without one or more greatly produced 

 bows or loops 

 d Basal clasp segment lobed 



e The lobe apical, setose or spinose and the terminal clasp seg- 

 ment subapical Lobodiplosis Felt 



ee The lobe basal, setose or nearly glabrous 



/ Ventral plate or harpes strongly chitinized 



Coquillettomyia Felt 

 ff Ventral plate and harpes as in Lestodiplosis and not 



chitinized Feltiella Rubs. 



dd Basal clasp segment not distinctly lobed 



e Terminal clasp segment subfusiform, distinctly dilated, 



harpes strongly chitinized and very complex 



Karschomyia Felt 

 ee Terminal clasp segment not as above 



/ Claws curved nearly at right angles, ventral plate 

 greatly elongate and emarginate apically, dorsal plate . 



deeply cleft and triangularly emarginate 



Clinodiplosis Kieff. 

 ff Claws not strongly curved and therefore not forming 

 almost a right angle, ventral plate not greatly pro- 

 duced, the lobes of the dorsal plate not divided, 

 cleft or triangularly emarginate, the female flagellate 

 antennal segments with normal, low circumfili, the 



ovipositor short M y c o d i p 1 o s i s Rubs. 



bb Palpi triarticulate 



c Terminal clasp segment not greatly produced, ventral plate short 



and broad Diadiplosis Felt 



aaa Claws simple or not toothed on any of the legs 

 b I'alpi quadriarticulate 



c Third vein uniting with the margin before the apex of the wing 



d The, stems of the flagellate antennal segments mostly with a 

 length less than the diameter, the circumfih rather short, 



ventral plate deeply bilobed, not greatly produced 



Arthrocnodax Rubs. 

 cc Third vein imiting with costa beyond the apex of the wing 

 d Circumfili with short bows or wanting 



e Some of the flagellate antennal segments cylindric 



/ Circumfili rudimentary or wanting, the loth to the 

 14th segments cylindrical, the harpes somewhat 



inflated Prodiplosis Felt 



// Circumfili distinct though low, all the flagellate or 

 only the distal antennal segments cylindrical, male 

 antennae about as long as the body, ovipostor short 



Caryomyia Felt 

 ee Flagellate antennal segments binodose in the male 



/ Stems of the flagellate antennal segments very short, 

 transverse, antennae about as long as the body, the 

 ovipositor short Caryomyia Felt 



