264 DIPTERA NEMATOCERA. 



9 . Nearly related to T. ornatepennis Brun. (India) and 

 T. festivipennis Edw. (Malay Peninsula), differing from the 

 former as follows : Ground colour of wings more extensively 

 dark ; all the white markings edged with darker brown than the 

 general ground colour ; lo\Aer half of wing more variegated ; 

 two conspicuous white spots alternating with darker patches in 

 the lower basal cell. Cu.^a much nearer to the fork of M than 

 is the base of cell Mj. 



Mt. Dulit, foot— 29. 



Trentepohlia (Plesiomongoma) nigropennata Edw. MS.* 

 Mt. Duht, foot— 19. 



Trentepohlia (Mongoma) pennipes O.S. 

 Mt. Dulit, foot— 2 cf ; Songei Tutau— 1 cf. 



Trentepohlia (Mongoma) fortis sp. n. 



cT- Head ochreous, with a strong central keel. Scape of 

 antennae brownish-ochreous (flagellum missingj. Palpi and 

 proboscis ochreous. Tliorax uniformly ochreous. Ahdomen 

 ochreous, with a narrow brown median dorsal line ; claspers 

 black, of the usual form. Legs rather stout, coxae and femora 

 ochreous; tips of the latter rather broadly and conspicuously 

 black; tibiae ochreous at the base, gradually shading to black 

 at the tip ; tarsi dark brown, hind femora with only three or 

 four short spiues close together at the base beneath. Wings 

 rather broad, hyaline, without markings on the membrane; 

 veins mostly yellowish, but the tip of Rs, cross- vein r, base of 

 R2, and the whole of -R4 + 5 and Gu black. -R2 long, placed a 

 little beyond r, which is oblique; discal cell rather less than 

 twice as long as broad ; cell M^ with its base considerably nearer 

 the base of the discal cell than that of cell M^ ; Cu^a about 

 half its length beyond the base of the discal cell ; Cii^ ending 

 almost in the tip of An. Halteres light ochreous. 



Length of body 14 mm. ; wing 12 mm. 



Kalabit Country, October — 1 cf. 



A large rather stoutly built species, evidently allied to T. 

 cariniceps End. and T. nigriceps de Meij. from Sumatra, but 

 quite distinct. 



* Kuala Lumpur Museum Collection. 



