138 Dr. A. G. Butler—^ Revision 



golden in colour ; the black border of the secondaries con- 

 siderably narrower (about the width of that in I. cingalensis, 

 but slightly wider towards anal angle) ; under surface clear 

 lemon-yellow, marked as in the typical dry-season fonn of 

 /. latifasciatus. 



Expanse of wings 59 raillira. 



'Dry form, ^ , Perak {Townsetid) ; from G. and S. coll. 



Although we only have one example of this species, I am 

 quite satisfied of its distinctness. The type was a wet-season 

 form. 



15. Ixias cingalensis . 



Ixias cingalensis, Moore, Lep. Ceylon, i. p. 126, pi. i. figs. 2, 2 a (1881). 



Ceylon. B. M. 



We have thirteen examples of this species, four of which 

 are wet-season males and the remainder dry-season specimens 

 of both sexes. The Hewitson collection contains four 

 examples. 



Capt. Watson extended the range of this species over 

 Southern India and regarded /. ihoda^=I. kausala as the dry 

 form of the species ; but the wet and dry forms of /. cinga- 

 lensis are absolutely identical on the upper surface, nor does 

 /. kausala invariably possess the character upon which 

 Capt. Watson defined /. cingalensis, for he says : — " It can 

 be separated at once from all other forms of yellow Ixias by 

 the greater extent of the basal yellow of the fore wing, which 

 spreads into the upper median interspace." In our specimens 

 of /. kausala the " basal yellow " extends more, less, or not 

 at all into the upper median interspace. 



/. cingalensis can be picked out at sight from a crowd of 

 nearly allied forms, but the distinction given above is useless 

 as a guide ; its chief peculiarity is the narrowness and angu- 

 larity of the orange belt across the primaries combined with 

 the sharply defined and perfectly straight inner edge of this 

 belt from subcostal vein to first median branch. 



16. Ixias frequens. 



Ixias frequens, Butler, P. Z. S. 1880, p. 1-30, pi. xv. figs. 6, 7. 

 Ixias alana, Swinhoe, Ann. & Mag. Nat. Hist. ser. 6, vol. v. p. 357 

 (1890). 



India generally. B. M. 



Thirty -three examples, representing wet-, intermediate-, 

 and dry-season forms ; the males and sometimes the females 

 of the dry form are smaller and with much narrower (though 

 always well-marked) border to the upper surface of the 

 secondaries. 



