140 Dr. A. G. Butler— .4 Revision 



The type of the species is an intermediate-season form, 

 but so little marked below that it probably occurs at the end 

 of the wet season. We also have two dry forms, the first 

 occurring probably at the commencement of the dry season 

 and the other (which is more extreme in its seasonal cha- 

 racters) a little later ; the latter is /. pygmcea. This species 

 is characterized by the very irregular and somewhat narrow 

 orange belt on the primaries of the male, the macular and 

 rapidly tapering form of the blackish border to the second- 

 aries ; the dry-season female varies very little in colour, the 

 subapical belt on the primaries being sulphur-yellow, some- 

 times feebly washed with orange. 



20. Ijcias ptrenassa. 



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



pi. ix. fig. 4, S (1867). 

 Ixias kausalu, Moore, Ann. & Mag. Nat. Hist. ser. 4, vol. xx. p. 49 



(1877). 

 Ixias jhoda, Swinhoe, P. Z. S. 1885, p. 142, pi. ix. figs. 3, 4. 



Western India southwards to Depalpur. Twenty-eight 

 specimens. B. M. 



It is quite possible that this may only be represented by 

 dry phases of /. dharmsalce ; /. pirenassa, I. jhoda, and 

 /. kausala representing three grades, of which the last- 

 mentioned is the most pronounced dry form. We have four 

 intermediate-seasonal specimens, one of which, in the pattern 

 of the upper surface, links typical /. pirenassa to /. jhoda, 

 whilst the three others show the upper-surface pattern of 

 1. jhoda and the size of /. kausala. 



The only objection to sinking/, dharmsalce undev I. pirenassa 

 is that we should have to admit great instability in the 

 seasonal modification of the hind-wing border (some of the 

 examples obtained just after the rains showing a drier cha- 

 racter of upper surface than those of the dry season), and we 

 should also be compelled to recognize five grades of dryness 

 in the under-surface pattern. On the whole I prefer to await 

 further evidence before assuming that the forms of the 

 /. pyrene section of my group 3 are more variable than those 

 of the /. evippe section. 



21. Ixias sesia. 



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

 pi. xxxi. fig. 2 (1798). 



Burmah. Nineteen examples. B. M. 



All the specimens that I have seen, including four in the 



