xiii, D, 6 Felt: New Philippine Gall Midges 307 



/'. Ventral plate deeply bilobed, third and fourth antenna! seg- 

 ments fused in the male, the enlargement of the third a 



little longer than that of the fourth Semudobia Kieff. 



/■. Ventral plate entire, third and fourth segments not fused, 

 the enlargement of the third twice as long as that of 



the fourth Apiomyia KiefF. 



e". Basal clasp segment otherwise. 

 /\ Stems of the flagellate antennal segments short in both sexes. 

 g^. Antennae with 22 to 25 segments (palpi are given as bi- or 

 triarticulate) ; costa, subcosta, and third vein scaled. 



Tlleia Riibs. 

 g'. Antennje with 17 segments, the flagellate segments with 

 5 or 6 slightly looped circumfila; wings with a super- 

 numerary vein Lyciomyia Kieff. and Jorg. 



/■. Stems of the flagellate antennal segments long in the male, 

 very short or wanting in the female. 

 g^. Third and fourth antennal segments fused; terminal clasp 

 segment not large, gradually constricted, the larva with 



a breastbone Blastomyia Kieff. 



g'. Third and fourth antennal segments not fused; terminal 

 clasp segment very large, swollen, the larva without a 



breastbone Iteomyia Kieff. 



a^. Palpi bi- or uniarticulate. 



b\ Ovipositor chitinized, cultriform or more or less aciculate. 



Sackenomyia Felt. 

 b'. Ovipositor not distinctly chitinized. 



c\ Pulvilli nearly twice as long as the empodium. 



cP. Palpi biarticulate Psectrosema Kieff. 



dr. Palpi uniarticulate Walshomyia Felt. 



c'. Pulvilli equal to the empodium; palpi uniarticulate. 



Isosandalum Kieff. ' 

 c^. Pulvilli distinctly shorter than the empodium. 

 d\ Empodium as long as or longer than the claws. 



e\ Third flagellate antennal segment of the male large and with 

 three circumfila, the other segments with two whorls. 



Guignonia Kieff. 

 e'. Third flagellate antennal segment not large and heavy and 

 having no more circumfila than the others. 

 f-. Terminal clasp segment large, swollen, or only slightly con- 

 stricted distad; ovipositor subcylindric, greatly protractile; 

 terminal segment strongly constricted, pocket-shaped. 

 g^. Flagellate antennal segments with a long stem in both 



sexes; circumfila reticulate Rliopalomyia Riibs. 



g". Flagellate antennal segments sessile or subsessile in the 

 female; circumfila not reticulate. 



d\ Empodium twice as long the claws Arceuthomyia Kieff. 



d'. Empodium not longer or only a little longer than the claws; 

 palpi uniarticulate; larva without a breastbone. 



Misospatha Kieff.* 



* Panteliola Kieff., according to Kieffer, is separated from Misospatha 

 by the biarticulate palpi. 



