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. 21
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