NOVITATES ZOOLOGICAE XXII. 1915. 311 



NEW GENERA AND SPECIES OF AFRICAN 

 GE03IETBIDAE. 



By LOUIS B. PROUT, F.E.S. 



Subfamily OENOCHROMINAE 

 Derambila Walk. 



Derambila Walk., List Lep. Ins. xxvi. 1630 (1862). 

 Chionopteryr. Suell., Tijd. Eiil. xvi. 72 (1873). 

 Ramhara Moore, Lep. Cei/l. iii. 458 (1887). 

 Corium Prout, Gen. Ins. 104, p. 75 (1910). 



I find the veuatioiial diflfereaces on which I founded my genus Corium are 

 not perfectly constant, and the name must sink in the synonymy of Derambila, 

 although the venation will usually be helpful in determining the species. Even in 

 the jjue/ la group, SC oftener arises from the cell than from the stalk of the other 

 subcostals. I have not yet found among the Indo-Australian species of Derambila 

 a single exception to the given venation (SO' running into C), bnt in the African 

 D. syriecdema Front I have one example in which SC again separates from C near 

 the costal margin, while on the other hand I liave before me a D. iridoptera (Prout, 

 jS'ot'. Zool. XX. 304, as ('oriiuii) iu which they remain coincident. Moreover, a 

 specimen from Uganda which AV'arreu has labelled punctisignata Walk., and which 

 (pending fresh study of Walker's type) I am inclined to accept as a large form 

 thereof, has the Corium venation, as has also the closely allied hyperphijes (Front, 

 Ann. Mag. Nat. Hist. (8) viii. 704, as Corium). 



1. Derambila delostigma sp. no v. 



S, 2(1-3(1 mm. Head mostly white, palpus marked with brown at ends of 

 joints. Antcunal ciliatiou very short. Thorax white. Abdomen long and slender ; 

 white, with large light-brown dorsal spots. Hindtibia moderately dilated, with 

 light-brown hair-pencil. 



Foreu'iiiij with apex acnte and slightly produced ; SC from cell, anastomosing 

 with C and with SC'~' ; pure white, costal edge light ochreous brown, a rather strong 

 irroration of the same extending to SC ; lines light ochreous brown, formed of spots 

 on veins and folds ; antemedian series small, forming a curve from SC at one-third 

 to SM- before one-third, the spot on SC mixed with black scales ; postmedian series 

 larger, from SC^ at 2 mm. from apex, rather nearer termen at SC*, R' and R', 

 slightly receding at R- and M', forming a strong proximal curve behind, falling 

 vertically on hindmargin before two-thirds; a strong black discal dot; small black 



terminal dots between the veins. Flindwing with costa concolorous ; lirst line 



wanting ; cell-spot larger, snbtriangular ; postmedian spots rather smaller than on 

 forewing, similarly arranged. 



Underside white with small black cell-dots. 



Mlanje, Nyassaland, March — May 1913 (S. A. Neave). Type in coll. 

 Rothschild,* others in coll. Brit. Mus. A worn example from Fammbira, Lake 

 Nyassa, November (>, 1893 (Dr. Ansorge) in coll. Rothschild. 



* = Tring Museum throughout this article. 



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