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Show 724 MR. A. G. BUTLER ON ANGOLAN BUTTERFLIES. [Dec. 5, are so nearly allied in this genus, their number so great, and their markings so complicated, that it is impossible, in most cases, without the assistance of figures or types, to be certain of the identification of a species, even though characterized by so careful a describer as the author of * Rhopalocera Africae Australis.' Family PAPILIONID.E (Doubl.), Bates. Subfamily PIERIN-E, Bates. Genus T E R I A S , Swainson. 1. TERIAS SENEGALENSIS. Terias senegalensis, Boisduval, Sp. Ge'n. Lep. i. p. 672 (1836). 2. TERIAS PULCHELLA. Xanthidia pulchella, Boisduval, Faune de Madag. p. 20, pl. 2. fig. 7. Genus TERACOLUS, Swainson. 1. TERACOLUS LOANDICUS, sp. n. cS . Alee supra albee, apice late aurantiaco, fusco cincto, extrorsum sinuato; area basali cinereo rorata : posticce punctis sex decres-centibus marginalibus venas terminantibus ; corpus nigrum, griseo-hirtum. Alee subtus albee ; anticce area apicali flava, plaga subapicali diffuse aurantiaca : posticce roseo tincta? fusco roratee, stria discali interrupta sqamosa fusca; puncto discocellulari nigro, introrsum fulvo cincto : exp. alar. une. 1, lin. 6-8. 5 • Alee supra albee; anticce puncto discocellulari nigro ; area apicali late aurantiaca; fascia lata subapicali subangulata, venis apicalibus et margine lato externo, nigris; area basali-interna cinereo-scptamosa : posticce margine externo angulis alternis dentato nigro; puncto costali et nebula centrali discali squamosis nigris; area basali cinereo-squamosa. Alee subtus, anticce albee, area apicali ochracea, fascia lata diffusa puncta grisea includente aurantiaca ; costa fiavida, puncto discocellulari nigro : posticce ochraceee costa basali aurantiaca, aliter velut in mare : exp. alar une. 1, lin. 6. 2. TERACOLUS INTERRUPTUS, sp. n. cS . Alee supra albee, area apicali aurantiaca, a stria media valde indistincta interrupta, hac maculam distinctam in nervulo secundo mediano formante; venis apicalibus extrorsum nigrescentibus et margine profundius dentato-sinuato; area basali ochraceo tincta ; posticce maculis marginalibus fasciam angulis alternis forman-tibus; area interno-basali ochraceo tincta; aliter velut in specie preecedente: exp. alar. une. 1, lin. 7. $ . Similis speciei preecedenti, differt area apicali anticarum dilutius aurantiaca; fascia subapncali tenuiore, introrsum sinuata; area |