FAINIILV CECIDOMVID.K THE GALL MIDGES 111 



56. Ovipositor protractile, aciculate or nearly so; terminal clasper of male 



usually unidentate or bidentate 57 



Ovipositor exserted, with lobes or triangular plates apically; terminal 

 clasper of male usually serrate apically 58 



57. Palpi with four segments (33) Schizomyia Kieflfev 



Palpi with two or three segments (17) Asphondylia Loew 



58. Palpi with four segments 59 



Palpi with three segments Feltomyia Kieffev 



59. Flagellate antennal segments cylindrical, not strongly constricted; 



circumfila usually with many fine reticulations in the male; pulvilli 



usually shorter than the claws (31) Cincticornia Felt 



Flagellate segments cylindrical, sometimes rather strongly con- 

 stricted; circumfila forming transverse series of low lines or loops; 

 lobes of ovipositor subtriangular Caryomyia Felt 



60. Nodes of the male flagellate antennal segments equal, only two cir- 



cumfila 61. 



Nodes of male flagellate segments plainly unequal, three circumfila. . 71 



61. Palpi with three or four segments 62 



Palpi with one segment Kronodiplosis Felt 



62. Palpi with four segments 64 



Palpi with three segments 63 



63. Terminal clasp segment irregular, pectinate apically. 



Pectinodiplosis Felt 

 Terminal clasp segment normal Dentifibula Felt 



64. Claws on all the legs simple 67 



Claws on at least the front legs toothed 65 



65. Claws on all the legs toothed 66 



Only the anterior claws toothed Toxomyia Felt 



6G. Internal basal lobe of the basal clasp segment smooth, the dorsal and 

 ventral plates broadly and slightly emarginate, the ovipositor with 

 a length one-half that of the abdomen, protractile. . .Erosomyia Felt 

 Internal basal lobe of the basal clasp segment rudimentary, smooth; 

 dorsal plate truncate, ventral plate broadly and roundly emargi- 

 nate; ovipositor moderately long Mangodiplosis Tavares 



67. Wings of males with the posterior area greatly produced and broadly 



rounded Lobopteromyia Felt 



Wings normal, not unusually broad 68 



68. Costa not clothed with .scales 69 



Costa thickly clothed with scales Endaphis KiefFer 



69. Third vein interrupting the costa at its union with the margin 70 



Third vein not interrupting the costa at its union with the margin 



(See text fig.) Thecodiplosis Kieffer 



70. Wings hyaline Contarinia Rondani 



Wings spotted Stictodiplosis Kieffer 



71. Claws toothed on all the legs 72 



Claws of at lea.st the posterior legs not toothed 84 



