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, with- 

 out the assistance of figures or types, to be certain of the identifica- 

 tion of a species, even though characterized by so careful a describer 

 as the author of ' Rhopalocera Africfe Australis.' 



Family Papilionid^; (Doubl.), Bates. 



Subfamily Pierin,e, Bates. 



Genus Terias, Swainson. 



1. Terias senegalensis. 



Terias senegalensis, Boisduval, Sp. Gen. Lep. i. p. 672 (1836). 



2. Terias pulchella. 



Xanthidia pulchella, Boisduval, Faune de Madag. p. 20, pi. 2. 

 fig- 7. 



Genus Teracolus, Swainson. 



1. Teracolus loandicus, sp. n. 



<$ . Alee supra alba, apice late aurantiaco, fusco cincto, extrorsum 

 sinuato ; area basali cinereo rorata : posticce punctis sex decres- 

 centibus marginalibus verias terminantibus ; corpus nigrum, griseo- 

 hirtum. 



Alee subtus albce ; anticce area apicali flava, plaga subapicali diffuse 

 aurantiaca : posticce roseo tinctce fusco rorata, stria discali inter- 

 rupta sqamosa fusca ; puncto discocellulari nigra, introrsum 

 fulvo cincto : exp. alar. unc. 1, I'm. 6—8. 



5 . Alee supra albce ; anticce puncto discocellulari nigro ; area api- 

 cali late aurantiaca; fascia lata subapicali subangulata, venis 

 apicalibus et margine lato externo, nigris ; area basali-interna 

 cinereo-squamosa : posticce margine externo angulis alternis den- 

 tato nigro ; puncto costali et nebula centrali discali squamosis 

 nigris; area basali cinereo-squamosa. 



Alee subtus, anticce albce, area apicali ochracea, fascia lata diffusa 

 puncta grisea includente aurantiaca ; costa flavida, puncto disco- 

 cellulari nigro : posticce ochracea costa basali aurantiaca, aliter 

 velut in mare : exp. alar unc. 1, lin. 6. 



2. Teracolus interruptus, sp. n. 



c? . Alee supra alba, area ap>icali aurantiaca, a stria media valde in- 

 distincta interrupta, hac maculam distinctam in nervulo secundo 

 mediano formante ; venis apicalibus extrorsum nigrescentibus et 

 margine profundius dent at o- sinuato ; area basali ochraceo tincta : 

 posticce maculis marginalibus fasciam angulis alternis forman- 

 tibus ; area interno-basali ochraceo tincta ; aliter velut in specie 

 prcecedente; exp. alar. unc. 1, lin. 7. 



5 . Similis speciei prcecedenti, differt area apicali anticarum dilulius 

 aurantiaca ; fascia subapicali tenuiore, introrsum sinuata ; area 



