306 The Philippine Journal of Science i9i8 



d\ Terminal clasp segment moderately large, pubescent, gradually 



tapering; ovipositor long, cylindric Janetiella Kieff. 



d'. Terminal clasp segment large, elongate-ellipsoidal, the dorsal 

 and ventral plates bilobed; ovipositor protractile. 



Zygiobia Kieff. 

 c\ Antennffi with 13 segments. 



d\ Female having the stems of the flagellate segments with a length 

 two-thirds that of the segment, the terminal clasp segment 



slender Nanolauthia Kieff. 



6". Third vein uniting with the margin at or very near the apex. 

 c\ Antenna with 14 segments, the genitalia and ovipositor about as 



in Dasyneura Phytophaga Rond. 



c". Antennae with 16 to 20 segments. 



d'. Third and fourth antennal segments not fused. 



e'. Antennal segments in the male with a stem about two-thirds 

 the length of the segment; terminal clasp segment rather 



slender, long, tapering gradually Phegomyia Kieff. 



c'. Stem of the flagellate antennal segment as long as the basal 

 enlargement, otherwise as in the preceding. 



Craneiobia Kieff. 



d\ Third and fourth antennal segments fused; antennae with 18 or 



19 segments, the stem of the flagellate segments with a length 



one-half to two-thirds that of the segment; terminal clasp 



segment slightly enlarged, gradually tapering, the dorsal and 



ventral plates deeply bilobed Phegobia Kieff. 



c^ Antennas with 20 to 24 segments. 



d\ Antennal segments of male stemmed, those of female sessile; 

 dorsal and ventral plates emarginate; ovipositor short, lobed. 



Mikiola Kieff. 

 a-. Palpi triarticulate. 



b\ Ovipositor distinctly chitinized. 



c\ Ovipositor aciculate or cultriform; antennal segments 12 to 24. 



Sackenom3ria Felt. 

 c'. Ovipositor short, with a rounded, chitinized terminal plate; antennal 



segments 13 Phlyctidobla Kieff. 



6". Ovipositor not chitinized. 



c\ Terminal clasp segment of male subapical, the basal clasp segment 



with a broad, apical lobe Luzonomyia g. nov. 



c". Terminal clasp segment of male apical. 



d\ Ovipositor almost truncate apically, without a distinct pocket; 

 terminal clasp segment not large, the empodium twice as long 

 as the claws, the third and fourth antennal segments not fused. 



Oligotrophus Latr. 



c'. Ovipositor with the terminal segment pocket-shaped, the empodium 



much longer or only a little longer than the claws. 



(f. Intermediate whorl of the flagellate antennal segments in the 



male with two greatly produced hairs, the third and fourth 



antennal segments fused; terminal clasp segment very large, 



elongate, ellipsoidal Mikomyia Kieff. 



(P. Whorls of the flagellate antennal segments otherwise. 



e'. Basal clasp segment with a median, membranous, transparent 

 prolongation attaining the tip of the ventral plate; terminal 

 clasp segment large, pointed, ovoid. 



