MTCOMYIA. 75 



central bristles, a double row of median microscopic bristly hairs, 

 and an irregular row (duplicated here and there) of bristly hairs 

 of various lengths along the black stripes. Some moderately long 

 bristles about the shoulders and humeri, on the posterior corners 

 of dorsuin, aud several distinct bristles on the lateral margins above 

 the wings. Small bristly hairs occur here and there irregularly. 

 Scutellum with two pairs of strong spiny bristles on posterior 

 margin. Abdomen orange-yellow. In one example (type) there is 

 a black dorsal stripe of moderate width, with a tendency to 

 enlargement on posterior margins. Whole abdomen lightly 

 covered with short yellow hairs. Lateral edges of dorsum 

 narrowly black ; belly orange-yellow. In the second specimen the 

 black colour is not so distinctly in the form of a line, being more 

 irregular and forming a distinct band on the penultimate segment. 

 Genitalia in both sexes small, withdrawn. Legs : in type, orange- 

 yellow (in second example, pale yellow) ; tibiae in both specimens 

 pale brownish yellow towards tips ; tarsi black. Wings pale grey, 

 yellowish from costa to 3rd longitudinal vein. Inner cross-vein, 

 and the upper branches of 1st and 3rd veins distinctly but 

 narrowly suffused.* A slight darkening at wing-tip, at the 

 forking of the 4th vein (type) or from thence along the hind 

 margin (2nd specimen). Halteres yellow. 



Length 4-4| millim. 



Described from two males in the Indian Museum, one taken by 

 Dr. Annandale at Kurseong, Darjiliug, 3. vii. 08, the other from 

 Calcutta, 11. ii. 90, and one female from Darjiling, 29. v. 10, taken 

 by me, also in the same Museum. 



In spite of the additional median thoracic line and the slight 

 difference in the disposition of the black colour on the abdomen, 

 and the deeper general colour of the type, I believe that the two 

 specimens are con specific. 



31. Mycomyia trilineata, sp. nov. 



J . Head: frons, vertex, back of head and flagellum, black; 

 face and epistome, palpi and scape bright yellow. Thorax, scutel- 

 lum, and metanotum pale yellowish. Three brown stripes of the 

 usual pattern, the median one the longest, reaching fore border, 

 and very narrowly divided. Seen from behind, the stripes, and 

 also the pleurae, have a slight bluish-grey tinge. Bristly hairs, as 

 in M. ferruginea. The minute bristly hairs of the dorsum, irregu- 

 larly placed ; they also line the edges of the dark stripes, which 

 themselves are bare. Abdomen: dorsum mainly black, posterior 

 margins of first five segments broadly yellow ; belly yellow. Sur- 

 face of: abdomen with black hairs which are stronger towards tip. 

 Genitalia composed of a large dark semicircular plate, the claspers 

 and appendages slender, yeUowish. Legs pale yellow ; posterior 

 femora with a row of well separated, rather long hairs below; 

 tibiae brownish yellow ; tarsi black. Wings pale grey, iridescent : 



* The sciophiline cell 2-2J times as long as broad. 



