XII, D, 3 Bezzi: Studies in Philippine Diptera, II 137 



Female. — Length of body, 3 millimeters; of wing, 3. Head 

 entirely black, only the broad frontal stripes being dark reddish 

 brown in middle and in front ; f rons narrower than an eye, with 

 parallel sides or only a little narrowed near the antennas ; lunula 

 deep black ; antennae free, inserted at the middle of eyes, shaped 

 as in Rivellia, as long as the face, the third joint becoming 

 gradually attenuated, with a basal, microscopically pubescent 

 arista. Prselabrum greatly developed, but retracted, shining 

 black; palpi and proboscis black. Bristles of head black, two 

 pairs of frontoorbitals directed backward, ocellar short, post- 

 vertical small, two pairs of strong and long verticals, the inner 

 pair converging; frontal hairs scattered. 



Mesonotum longer than broad, little convex, entirely of a 

 rather shining greenish color, more black on the pleurae; the 

 short hairs along the dorsocentral lines black and extended to 

 the fore border; macrochaetas black, one humeral, two notopleu- 

 rals, three supra-alars, one dorsocentral, but I cannot perceive 

 a trace of mesopleural. Scutellum colored like the dorsum of 

 mesonotum, bare, with four long black marginal bristles. 

 Mesophragma shining black, with faint metallic reflections. 

 Squamae small, white ; halteres yellowish. 



Abdomen a little longer but not broader than the thorax, dis- 

 tinctly narrowed at base, scarcely punctulate, entirely shining 

 black-aeneous, with a purple band at base of third segment; 

 pubescence short and pale ; venter dull black ; ovipositor shining 

 black-aeneous, flattened. Legs proportionally long, simple, en- 

 tirely black, only the basal joints of all the tarsi dark reddish 

 brown; apical spur of middle tibiae well developed, black. 



Wings hyaline, iridescent with a black fore border which fills 

 the costal, subcostal, and the base of the marginal cell, ending 

 at the apex of first longitudinal vein ; besides there is an elongate, 

 apical brown spot filling the extreme end of submarginal cell and 

 extending a little over the third vein, where it ends truncately. 

 Veins pale yellowish with the exception of the first three, which 

 are blackish ; first vein ending a little before the middle of wing 

 and near to the costa; second vein rather short and near to the 

 first and to the costa, the marginal cell being thus exceedingly 

 narrow, almost linear, not broader than the costal cell; third 

 vein long, ending at apex of wing, perfectly straight, the sub- 

 marginal cell broader than the first posterior cell, which is 

 faintly dilated at end ; fourth vein entirely straight, without any 

 curvature in the discoidal cell on its second section ; fifth vein 

 short, divering; sixth extended to the hind border. Discoidal 

 cell very short, of almost triangular shape ; cross veins very close 



