250 MR. A. G. BUTLER ON NEW BUTTERFLIES. [Mar. 7, 



4. Descriptions of some new Species and a new Genus of 

 Pierincs, with a Monographic List of the Species of Ixias. 

 By A. G.Butler, P.L.S., F.Z.S., &c. 



[Received February 27, 1871.] 



(Plate XIX.) 



Genus Colias, Fabricius. 

 Colias imperialis, n. sp. (Plate XIX. fig. 2.) 



<5 . Alee supra aurantiacce : anticce area externa late fusca, 

 fiavo squamosa ; macula marginem costali-externum attingente 

 venisque nigris ; basi costaque basali flavo-virescentibus ; mar- 

 gine extremo costali fulvo ; striolis tribus subapicalibus favis 

 in venis positis ; ciliis fulvidis : posticce area costali fusca, 

 externa late nigra, abdominali Jlava : corpus fuscum, virescens ; 

 an tennis fuscis, clava compressa. 



Alee subtus flavo-virescentes : anticce area discoidali fulvo tincta ; 

 puncto triangulari fulvo pupillato discocelhdari ; fascia discali 

 nigro-fusca a margine interno ad ramum tertium medianum 

 currente, extrorsum profunde dentata, introrsum diffusa ; 

 area interna late rufo-fusca ; ciliis roseis : posticce area medio- 

 discali fulvo tincta ; macula discocellulari aurantiaca fusco 

 cincta, punctis duobus aurantiacis basalibus : corpus favum, 

 pedibus roseis. 



Exp. alar. unc. 2. 



$ . Alee supra maculis tribus subapicalibus et duabus subanali- 

 bus inter venas aureo-flavis ; fundo obscuriore, aliter velut in 

 mare: posticce fuscce ; dimidio interno fulvo squamoso ; fascia 

 maculari discali tnaculis, e quibus duabus superioribus flavidis, 

 inferioribus longioribus fulvis ; area abdominali pallide sul- 

 phurea : corpus nigrescens, capite roseo hirto. 



Alee subtus pallide virides : anticce dimidio interno fulvo ; margi- 

 nibus costali et externo roseis ; fascia submarginali ad ramum 

 discoidalem superiorem continuata, aliter velut in mare : corpus 

 albidum. 



Exp. alar. unc. 1, tin. 11. 



Port Famine {King) 1 Three examples, B.M. 



From the supplementary cases of the Banksian cabinet, in com- 

 pany with a collection from Port Famine, presented by Capt. King. 

 Allied to C. thisoa, hecla, Sec, especially the female. 



Scalidoneura, n. gen. 



Affinis Coliadi {sect, dimerse et euxanthis) ; alts angustioribus, 



antennis tenuioribus, clava robusta. 

 Alee anticce subtriangulares, vena costali pone medium costce ter~ 



minata ; ramo primo subcostali pone medium cellce discoidalis 



