1871.] MR. A. G. BUTLER ON NEW BUTTERFLIES. 253 



2. IxiAS UNDATUS. 



Ixias undatus, supra. 



3. Ixias latifasciatus. 

 Ixias latifasciatus, supra. 



4. Ixias sesia. 



$ . Papilio sesia, Fabricius, Gen. Ins. p. 257 (1777) ; Donovan, 

 Ins. China, pi. 31. rig. 2 (1798). 



Thestias pirenassa, Wallace, Trans. Ent. Soc. ser. 3. vol. iv. p. 395. 

 n. 8. pi. 9. fig. 4 (1867). 



Bengal, Bhotan ? tf $ , B.M. 



The female differs from the male in the narrowness of the sub- 

 apical orange band, which also exhibits one or two oval spots between 

 the median branches. 



5. Ixias anexibia. 



c?. Papilio pyrene, Cramer, Pap. Exot. ii. pi. 125. figs. A-C 

 (1779). 



P. sesia, Herbst, Natursyst. Schmett. pi. 109. figs. 1-3 (1792). 



Ixias anexibia, Hiibner, Verz. bek. Schmett. p. 95. n. 1008 

 (1816). 



3 2, Punjaub; 6* 2> var., Bengal. B.M. 



Chiefly differs from the preceding in its slightly superior size, 

 more strongly margined hind wings, and in the colour of the sub- 

 apical band in the female, which, in the typical form, is sulphur- 

 yellow, but in the Bengalese variety yellowish white. The male of 

 the latter is that represented by Cramer at figs. A & B. 



6. Ixias pyrene. 



<? . Papilio pyrene, Linnaeus, Mus. Lud. Ulr. p. 241 (1764). 



? . P. cenippe, Cramer, Pap. Exot. ii. pi. 105. figs. C, D (1779). 



China, Silhet, Bhotan. B.M. 



Differs from the preceding species in the almost spotless hind 

 wings, the marginal band being reduced to two or three squamose 

 subapical spots, sometimes entirely wanting. 



7. Ixias balice. 



<3 . Thestias balice, Boisduval, Sp. Gen. Ldp. i. p. 593. n. 4 (1836). 



Java (Horsfield). B.M. 



Remarkable for the great width of the orange apical patch which 

 surrounds the discoidal spot, and unites with the yellow ground- 

 colour. 



8. Ixias Marianne. 



c? $ . Papilio marianne, Cramer, Pap. Exot. iii. pi. 217. figs. C-E 

 (1782). 



S . Ixias bebryce, Hiibner, Verz. bek. Schmett. p. 95. n. 1009 

 (1816). 



