FAMILY CECIDOMYID.E — THE GALL MIDGES 113 



72. Palpi with four segments 75 



Palpi with three segments 73 



73. Basal clasp segment of male distinctly lobed Peridiplosis Feit 



Basal clasp segment of male not lobed 74 



74. Flagellate antennal segments of female subcylindrical. 



Kalodiplosis Felt 

 Flagellate antennal segments of female binodose (Brit. Guiana). 



Epihormomyia Felt 



75. Circumfila with one or more greatly produced bows or loops having a 



length five to ten times that of the enlargement and extending at 



approximately right angles to it. '. 76 



Circumfila all about equal, nearly regular 80 



76. Three well-developed circumfila on each flagellate antennal segment. . 77 

 Two well-developed, irregular circumfila; basal circumfila on the 



distal enlargement forming a low band; pulvijli small .Bremia Rondani 



77. All three circumfila irregular, the pulvilli i-udimentary. 



Tribremia KiefFer 

 At most two circumfila irregular 7S 



78. Pulvilli shorter than the claws; two circumfila irregular 79 



Pulvilli as long as or longer than the claws; one circumfila irregular. 



Aphidolete.s Kieffer 



79. Pulvilli slightly shorter than the claws, conspicuous. . .Isobremia Kieffer 

 Pulvilli i-udimentary or wanting Cryptobremia Kieffer 



80. Basal clasp segment of male genitalia with basal lobe; ovipositor 



short and with large, orbicular lobes Youngomyia Felt 



Basal clasp segment without basal lobe 81 



81. Claws curved at neai'ly right angles 82 



Claws curved but not at nearly right angles 83 



82. Ventral plate moderately long, broadly emarginate; dorsal plate 



moderately long, broad, deeply triangularly emarginate, the lobes 



triangular; ovipositor short Cleodiplosis Felt 



Dorsal and ventral plates short, broad, deeply emarginate. 



Thomasia Eiibsaamen 



83. Ovipositor slightly protractile, the lobes long, curved, and with two 



or three subventral rows of obtuse spines Dicrodiplosis Kieffer 



Ovipositor about half the length of the abdomen, the lobes with a 

 length about six times the width; mouth parts prolonged (Brit. 

 Guiana) Delphodiplosis Felt 



84. Claws not toothed on any of the legs 92 



Claws toothed on at least the front legs 85 



85. Palpi with four segments 86 



Palpi with three segments Diadiplosis Felt 



86. Basal clasp segment lobed 87 



Basal clasp segment not distinctly lobed 89 



87. The lobe basal or sub-basal 88 



The lobe apical, setose or spinose; terminal clasp segment subapical. 



Lobodiplosis Felt 



