XIII, D, 6 Felt: New Philippine Gall Midges 313 



e^ One circumfilum irregular and with a bow or loop greatly 

 produced, the other two circumfila regular, the style simple. 

 f. Ventral plate large, oval, as long as or a little longer than the 

 ( dorsal; pulvilli equal to or longer than claws. 



Aphidoletes Kieff. 

 (P. Two well-developed, irregular circumfila; basal circumfilum on 

 the distal enlargement forming a low band; pulvilli small. 

 e\ Legs clothed with hairs, the style not arched. 

 p. Flagellate antennal segments with the distal enlargement 

 produced, the basal subglobose, the ventral plate linear, not 

 emarginate and as long as the simple style... Bremia Rond. 

 f'. Flagellate antennal segments with two subglobose enlarge- 

 ments, the ventral plate linear, emarginate and much 



shorter than the emarginate style Homobremia Kieflf. 



e^ Legs clothed with scales, the style strongly arched basally. 

 p. Ventral plate shorter than the dorsal, linear and rounded 



distally Lepidobremia Kieff. 



c'. Circumfila nearly regular and without one or more greatly produced 

 bows or loops. 

 cP. Basal clasp segment with a basal lobe. 



e^. Flagellate antennal segments trinodose; terminal clasp segment 

 much produced, plainly longer than the basal clasp segment; 

 ovipositor short and with large, orbicular lobes. 



Youngomyia Felt. 



e^ Flagellate antennal segments binodose; terminal clasp segment 



not greatly produced, the ventral plate linear, a little longer 



than the dorsal plate; ovipositor moderately short and with 



long, densely haired lobes Therodiplosis Kieff. 



d'. Basal clasp segment without a distinct basal lobe. 

 e\ Claws curved nearly at right angles. 

 f. Palpi long or moderately long. 



g^. Ventral plate linear, broadly emarginate; dorsal plate long, 

 broad, triangularly emarginate, the circumfila slightly 

 irregular, the style with filiform branches. 



Plesiobremia Kieff. 



g-. Ventral plate long, narrowly rounded apically; dorsal 



plate broad, deeply and broadly emarginate, the lobes 



moderately narrow apically Dichodiplosis Riibs. 



g^. Dorsal and ventral plates short, broad and deeply emargi- 

 nate Thomasia Riibs. 



f. Palpi short, the second antennal segment with a length one- 

 half greater than its diameter Collinia Kieff. 



e^ Claws not strongly curved basad and therefore not forming 

 almost a right angle. 

 f. Circumfila with numerous loops, about twenty. 



g'^. Lobes of the ventral plate linear and parallel; ovipositor 



rather short Geodiplosis Kieff. 



f. Circumfilar loops short, the hairs two to three times longer. 

 g^. Lobes of the ventral plate short, broadly rounded; ovipos- 

 itor short Calodiplosis Tav. 



f. Circumfilar loops normally long and not excessively numerous. 

 157348 8 



