400 



spot over the marginal vein, and a less distinct one at the tip of 

 the 2nd vein. 



Length 5 raillim. 



Described from a female from Darjiling, taken by me on the 

 hillside, 30. ix. 08. 



Type in the Indian Museum. 



Somewhat easy to distinguish by its glassy iridescent wings. 



296. Limnobia triangularis, sp. nov. 



$ . Head : frons very wide, dark grey ; antennae brownish 

 yellow ; proboscis yellowish, palpi darker. Thorax yellowish, 

 with three light brown dorsal stripes of the usual pattern ; the 

 outer ones continued hindvvards to the posterior margin, the 

 median one running from the anterior margin to middle of the 

 dorsum. Scutellum and metanotum brownish ; sides of thorax 

 yellowish, pleurae apparently not darker. Abdomen rather pale 

 yellowish : an indistinct narrow brown stripe on the posterior 

 imargins of most of the segments ; base of abdomen a little darker. 

 'Ovipositor moderate in size, yellow. Legs brownish yellow. 

 Wings clear. Auxiliary vein continued nearly as far as the 

 bifurcation of the 2nd vein ; the latter originating at some distance 

 before the middle of the wing, the prsefurca being much longer 

 than the remaining portion ; marginal cross-vein indistinct, opposite 

 anterior cross-vein ; basal part of 3rd vein about equal to anterior 

 ^cross-vein ; discal cell twice as long as broad, equal in length to 

 the 2nd posterior cell ; 3rd posterior cell triangular ; posterior 

 cross-vein in a line with the base of the discal cell. Stigma 

 distinct, pale blackish, indistinctly outlined ; the 1st, 5th, and 7th 

 yeins somewhat pronounced. Halteres yellowish. 



Length 3 millim. 



Described from one specimen from Barogh, in the Simla hills, 

 5000 ft., taken by Dr. Annandale, 10. v. 10, at the edge of a 

 small stream. 



Type in the Indian Museum. 



Genus CERATOSTEPHANUS, Brun. 



Ceratostephanus, Brunetti, Rec. Ind. Mus. vi, p. 271 (1911). 



GENOTYPE, Ceratostephanus antennatus, Brun. ; by present 

 -designation. 



General appearance and structure identical with those of 

 Limnobia, Mg., and Dicranomyia, Steph. Venation as in Limnobia, 

 except that the auxiliary vein, ending a little beyond the middle 

 of the wing, is almost exactly opposite the origin of the 2nd 

 longitudinal vein, with the subcostal cross-vein at its tip. 



Eyes closely touching on the upperside for the whole distance 

 from the vertex, also contiguous on the underside. Proboscis of 



