1893.] ME. E. E. ATJSTEIf OK KEW DIPrEROUS IXSECTS. 139 



bluntly oval ; arista brown, except the base. Thorax metallic black, 

 finely punctate, with very short, silky, yellowish pile ; humeri, a 

 stripe from them to the suture, a vertical stripe on the pleurce in 

 front of the suture, a large rounded spot below this stripe, an 

 oblique elongated spot behind the base of the \dngs, and the 

 anterior margin of the scutelJum pale yellow. Scutellum, except 

 anterior margin, blackish brown, punctate. Abdomen cylindrical 

 and ver}' narrow from posterior half of first segment to middle of 

 third, expanding and spatulate from thence to the tip ; general 

 colour reddish brown, clothed with short, appressed, blackish pile ; 

 second segment with fine, whitish, erect pile on the sides ; a very 

 conspicuous translucent yellow spot, occupying distal third (rather 

 more in 5 ) of the third segment, and shaped like an equilateral 

 triangle ; first segment yellow, brown at the tip ; second segment 

 reddish brown, darker at the tip, before which is a narrow indistinct 

 lighter band ; base of third segment yellowish, posterior margin 

 brown ; fourth segment polished dark brown, steely on posterior 

 margin in S ; fifth segment polished dark brown, with a steely 

 sheen ; external genitals reddish in both sexes, rather prominent 

 in (S . Legs luteous, coxse blackish brown ; posterior femora reddish 

 brown, yellowish at the base ; posterior tibiae pale yellow on basal 

 third, then dark brown ; first joint of posterior tarsi dark brown, 

 except at the tip ; this and the remaining joints dull yellow. 

 Wings hyaline, with a brownish tinge along the posterior margin ; 

 subcostal cell dark brown, and a brownish patch at the distal extre- 

 mity of the marginal and submargiiial cells, terminating sharply 

 at the third vein ; the latter straight ; veins dark brown : alulce 

 almost absent. 



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

 the wing, this species resembles B. pedicellafa, Dol. (according to 

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

 triangle on the third abdominal segment distinguishes the species 

 from any other known to me. 



Huldaraulla, Ceylon ; circa 4000 ft. {Lieut.-Colonel Yerhury). 

 A pair taken in cojjtdd, June 10, 1892. 



Baccha pulcheieeoxs, sp. n. (Plate lY. figs. 10, 10", 11, c5' 5 .) 



<5 2 ■ Length : c? 10 to 11| mm., $ 9| to 10| mm. 



In S , front, upper part of the face immediately below the an- 

 tennse, and a broad facial stripe reaching to the oi-al margin steely. 

 In $ , front, including whole circumference of anteuniferous pro- 

 jection and a facial stripe, narrower than in the c? , but reaching 

 to the oral margin, metallic black, sometimes steely ; sides of face 

 yellowish pollinose ; cheeks orange-yellow, with a blackish-brown 

 spot in front, more or less distinctly connected with the facial 

 stripe, sometimes indistinct in the $ . Front (including vertical 

 triangle in the c? ) and face clothed with pale yellow pile. Frontal 

 triangle in c? dusted with yellowish pollen above ; front in $ , a 

 little below the middle, with a triangular patch of pale yellow pollen 

 on each side, the apices of the triangles meeting or narrowly 



