310 Ilcrorils of the hidian Museum. [Vol. ^^ , 



p. 453 $, Kurseong ; orientalis, p. 453 (^ $, Darjiling ; subtincta, p. 455 

 (^$, Darjilino; ; flava, p. 455 (^ $, Bengal (var. Iocs.) ; grandior, p. 456 $, 

 Simla ; (jenii(dis, p. 456 r^ ^. Kiimaon. 



My E. brevior (he. cit., p. 452, (^ $) must be referred to Em/peda with 

 my Etnpeda inconspicua {loc. cit. p. 475 (^ $) as a synonym of it. 



My Erioptera halterata (loc. cit.. p. 457 ^^ $) is synonymous with flava. 

 the halteres varying in colour, and the 7th vein being equally sinuous in 

 both forms. 



Types of all in the Indian Museum, several species represented by 

 uniques. 



fusca, de Meij., Tijd. v. Ent. LVI, p. 351 (1913). Java. 

 nigripalpis, id., loc. cit., p. 351 (^ ("?" lapsus). 



The unique types in Amsterdam Museum. 

 insignis, Edw., Ann. Mag. Nat. Hist. (8) XVIII, p. 251 (^ $ 

 (1916). Arisan, Formosa, 8,000 ft., lO-x-12 {Nitobe), also in 

 the British Museum from Tokyo. Tijipe in British Museum. 

 alboguttata, Edw., loc. cit., p. 252 (^ (1916). Arisan, Formosa, 

 lO-x-12 (Nitobe). Unique type in British Museum. 



ACYPHONA, Os. Sac. 



Genotype : Erioptera venusta, Os. Sac. by present designation. 



fenestrata, de Meij., Ti^d. v. Ent. LVI, p. 352 $ (1913). Java. 

 The unique type in Amsterdam Museum. 



MESOCYPHONA, Os. Sac. 



Genotype : Erioptera caloptera, Say, by personal designation. 

 (Fauna, 1912). 



nigripes, Brun., Fauna Brit. Ind. Dipt., p. 458 ^J (1912). Kur- 

 seong, Darjiling. Type in Indian Museum. 



Mesocyphona gracilis, sp. nov. 



$. Assam-Bhutan Frontier. Long. 3 mm. 



Head and thorax moderately dull blackish-brown, with slight whitish 

 reflections ; pleurae with a slightly pinkish brown tinge with whitish 

 reflections ; scutellum shghtly yellowish. 



Abdomen nut-brown, posterior margins slightly darker. 



Legs. — Coxae pinkish-brown, remainder brownish-yellow, tarsi a 

 little darker. 



Wings clear, stigma barely perceptibly yellowish. Base of 3rd vein, 

 anterior cross vein, base of (open) discal cell and posterior cross vein 

 practically in a line. 1st submarginal and 2nd posterior cells subequal 

 in length. Halteres dirty brown. 



Described from a unique 9 iw the Indian Museum from Bhoirakund, 

 Assam-Bhutan Frontier, Darrang District, 18 — 22-x-r2 (Kemp). 



A slender, graceful species compared with nigropes, Brun. the only 

 other species known from India. 



