( 328 ) 



as broad in middle as the black outer area, discal bar M- — SM" faiutly vestigial, 

 bar R' — R' rather heavier, the postdiscal spot at its distal side small, two more 



postdiscal spots in black area between SC* and Rl Hindwing : postdiscal 



portions of postdisco-snbmargiual patches tawny olive, not black, the patches larger 

 than in repetitits except patches C — R' ; white submargiual dots long. 



Underside, discal, great part of postdiscal, a jwrtiou of the snbmediau inter- 

 spaces of both wings and the admarginal interspaces of the hindwing more or 

 less maize j'ellow ; discal bars deejdy arched ; tawny ochraceons marginal band 

 of forewing about 5 mm. broad at R', here wider than in repetitus ; tawny russet 

 postdiscal half-moons of hiudwiug with few black scales at outer side ; tawny 

 admarginal line of hindwing very prominent ; tail R^ slightly widened before end, 

 rounded at tip, tail IP indicated by a sharp tooth. 



Length of forewing : S , 43 — 46 mm. 

 „ „ ? , 57 mm. 



Hab. Nias. In the Tring Museum, 6 cJcJ, 1 ?. 



This large form of polyxena is fairly constant ; the conspicuously marked 

 underside distinguishes it from all other forms of poli/xena. Ch. polyxena fervens 

 does not seem to be rare, as we have seen several dozens of it. 



c. Ch. polyxena baya. 



Nymphalis haya Moore, in Horsf. & Moore, Cat. Lep. Ins. Mnis. E. I.C.I, p. 207. n. 424 (1867) (Java: 



not " N. India," nor larva and chrysalis) ; Pagenst., Jalirb. Xass. Ver. Nal. XLIII. p. 97. n. 64 



(IS'.IO) (E. Java). 

 Charaxes bat/a, Butler, Proc. Zool. Soc. Lmut. p. 636. n. 5,S. t. 37. f. 5, ,J (1865) (Java ; not 



" Borneo " and " India ") ; Druce, ibid. p. 346 (1873) (Java) ; Butl., Jnurn. Linn. Soc. Land. 



XXV. p. 391. n. 119 (1896) (pt. ; Java). 

 J . Charaxes amyous Felder, Reise Nofiiru, Lrp. p. 441. n. 71'.l (1867) (pt. ; ? , " Celebes " loc. err.). 

 Charaxes scylax Felder, Heise Norara, Lep. p. 442. n. 720 (1867) (Java) ; But)., Tr. Enl. Soc. LmuL 



p. 120. n. 11 (1870) (= baya). 

 Nymphalis j>olyxe}ia var. h. C. baya, Kirby, Cat. iJiurn. Lep. p. 272. sub n. 52 (1871) (pt. ; Java). 

 Nymphalis polyxena var. j. C. scylax, id.. I.e. (Java). 

 Nymphalis polyxena, Pagenstecher, I.e. n. 65 (1890) (E. Java, July). 

 Charaxes 2'olixeiui, Snellen, Tijdschr. r. Ent. XXXIII. p. 290. n. 26 (1890) (pt. ; Java). 

 Haridra scylax, Moore, Lep. Lid. II. p. 247 (1895) (Java), 

 Haridra baya, id., /.<•. p. 248 (1895) (Java). 

 Charaxes baja (!), Fruhstorfer, Berl.Ent. Zeitschr. XLI. p. 302(1896) (Java ; —scyllax ! loco sylax). 



c?. Winc/s above. — Forewing : black outer area broader between M- and internal 

 margin and narrower between R' and JP than in re pet it as, black discal liuiiform 

 spots R^ — SM" close to the black band, of the tawny iiostdiscal interspaces only the 

 last one to four developed, but sjjots R' — R' sometimes vestigial ; median bars 

 SC*' — R'' seldom absent, seldom entirely merged together with the black area, as a 

 rule separated from the latter by a doable tawny i)atch, but joined posteriorly to it 

 behind R^, where the black area is dilated basad; disc between cell and black outer 



area near costal margin sometimes rather pale. Hindwing : postdisco-snbmargiual 



patches gradually smaller behind, the postdiscal portions of patches IP — M* not 

 absent, though not so large as the snbmarginal portions, the white dots consequently 

 within the black ])atches, that of patch R' — IP nearer the outer than the inner edge 

 of the patch; black scaling more or less extending basad along SC. 



Underside variable as in the allied forms ; median interspaces R^ — !SM^ of the 

 forewing on the whole wider than the discal ones, while in repetitus the reverse is 

 generally the case ; second tail well indicated, rather longer than in repetitus, those 



