xv, 6 Bezzi: Fruit Flies from the Philippines 435 



the characters of the genus may be added: Face very short 

 in the middle, much shorter than the antennal grooves, which 

 are sometimes twice as long as it. Lunula broad. Scutellum 

 short and transverse. Wings short, distinctly shorter than body. 

 The swollen ovipositor, on account of the abdominal club being 

 very convex above and very concave beneath, is placed very 

 deeply below the rounded hind border of the last abdominal 

 segment. 



Chaetodacus bakeri, of which I am not sure about the pres- 

 ence of the prescutellar bristles, and which, for Chaetodacus, 

 has an unusually broad frons, is perhaps a member of the present 

 genus; but in this case it may be distinguished from all the 

 others by its first antennal joint being not elongated. The face, 

 however, is long and shaped as in Chaetodacus. 



The species of Mellesis seem to be rarer in the Islands than 

 those of the preceding genus; at least I have received only few 

 and scattered specimens of them. They can be distinguished 

 with the aid of the following table; two of them (M. pedunculata 

 and M. nummularia) are already named, but not described by 

 me in another paper. 18 



o\ Abdominal stalk less developed, short, broad, and depressed; fourth 

 and fifth abdominal segments entirely reddish at sides. 



M. subsessilis sp. nov. 



a*. Abdominal stalk very distinct, long, thin, and cylindrical; last abdominal 



segments with black spots at sides. 



6\ Frons very broad, with less-developed lower orbital bristles; a single 



yellow hypopleural spot; oval patches of fifth abdominal segment 



black; wings with narrow and elongate second basal cell, with 



no distinct anal stripe, and with costal border equally broad to 



the end _ ~ M. bioculata sp. nov. 



b*. Frons narrower and with well-developed orbital; hypopleural spot 



double; oval patches not black; wings with short and broad second 



basal cell. 



e 1 . Face with a black transverse band just above mouth border; 



mesonotum with no yellow postsutural middle stripe; costal 



border of wings narrow, not extending beyond third vein or only 



a little so near the end; no brown anal stripe on wings. 



M. pedunculata Bezzi. 



c\ Face with two black spots; mesonotum with yellow middle stripe; 



costal border dilated at end into a very broad rounded spot, 



which is extended below into second posterior cell; anal stripe 



well developed _ _ _ „ _ M. nummularia Bezzi. 



19. Mellesis subsessilis sp. nov. Plate II, fig. 3. 

 A robust species of proportionally greater size, very distinct 



" Bull. Ent. Research 7 (1916) 115. 



