BACCHA. 125 



more than luilt'-way down the face from the antennse. \'ertic'al 

 triangle in d" shining hhack, very long and narrow, extendinjr 

 more than one-third of the distance between tlie occiput and 

 antennae. Front of $ with a brownish triangular spot im- 

 mediately above the antenncne; very narrow above, metallic black, 

 with parallel sides for one-half of its length from the occiput. 

 Occiput dull black, poUinose, with a fringe of glistening whitish 

 hairs. Antennte orange, 3rd joint bluntly oval; arista brown, 

 except the base. Thorax metallic black, finely punctuate, with 

 very short silky yellowish pile; humeri, a stripe from then) to the 

 suture, a vertical stripe on the pleura in front of the suture, a laro-e 

 rounded spot below this stripe, an oblique elongated spot behind 

 the base of the wings, and the anterior margin of the scutellum, 

 pale yellow. Scutellum, except anterior margin, blackish-brown, 

 punctate. Abdomen cylindrical and very narrow- from posterior 

 half of 1st segment to midille of 3rd, expanding and spatulate 

 from thence to the tij) ; general colour reddish-brown, clothed 

 with short appressed, blackish pile ; 2nd segment with fine,, 

 whitish, erect pile ou the sides; a very conspicuous translucent 

 yellow spot occupying distal third (rather more in 5) of the 3rd 

 segment, and shaped like an equilateral triangle; 1st segment 

 yellow, brown ab the tip; 2nd segment reddish-brown, darker at 

 the tip, before which is a narrow indistinct lighter band ; base of 

 3rd segment yellowish, posterior margin brown ; 4th segment 

 polished dark brown, steely on posterior margin in c? ; 5th seg- 

 ment polished dark brown, with a steely sheen ; external genitalia 

 reddish in both sexes, rather prominent in J . Legs luteous, 

 coxte blackish-brown, posterior femora reddish-brown, yellowish at 

 the base; posterior tibije pale yellow on basal third, then dark 

 brown ; 1st joint of posterior tarsi dark brown except at the tip ; 

 this and the remaining joints dull yellow. Wings hyaline witli a 

 brownish tinge along the j)osterior margin ; sub(;ostal cell dark 

 brown, and a brownish patch at the distal extremity of the marginal 

 and submarginiil cells, terminating sharply at the 3rd vein; the 

 latter straight; veins dark bro\\n; aluhe almost absent.' 



"In the shape of the profile of the face and in the venation of 

 the wing, this species resembles B. j^edicellata, Uol. (according to 

 Doleschall's figure), from Java ; but the sharply defined yellow 

 triangle on the 3rd abdominal segment distinguishes the species 

 from any other known to me. 



"lluldamulha, Ceylon, circa 4000 ft. (Col. Ferburi/) : a ]iair 

 taken in copula, June 10, 1892." 



Length, 12^-13 mm. 



As elegans 1 described the species from Sukna, base of Dar- 

 jiling Hills, 500 ft., 1 & 2. vii. 1908, including tigpc; and from 

 jungle at base of Dawna Hills, l.iii. 1908 (hotli Annaiuhih). 

 Other specimens are from Kollur (ihat, 8. Kanara District. 

 3000 ft., 18-21. ix. 1913; Kungpo, Sikkim, 1400 ft., 0. ix. 1909. 

 The latter specimen lias the face wholly pale, but is no doubt 

 conspecilic with the nst. None of the specimens seen by me have 



