of the Genus Ixlas. 137 



but the Chinese and Indo-Burmese forms differ somewhat. 

 Taken collectively I. evippe runs somewhat smaller than 

 /. rhexia^ never attaining the expanse of wing which some of 

 the wet-season examples of that species show ; the form of 

 the wings in /. evippe is also rounder and more regular, the 

 orange belt on the primaries is distinctly broader and extends 

 further back into the discoidal cell, its front edge is diffused 

 instead of sharply outlined ; the seasonal forms also differ less 

 in size and in the width of the border on the upper surface of 

 the secondaries than in /. rhexia. 



12. Ixias undatus. 



Ixias undatus, Butler, P. Z. S. 1871, p. 252, pi. xix. fig. 4. 



Borneo. Ten specimens (all males). B. M. 

 There is also one male in the Hewitson collection. It is 

 curious that the female does not come to hand. 



13. Ixias latifasciatus. 

 Ixias latifasciatus (part.), Butler, P. Z. S. 1871, p. 252, J . 



Tenasserim, Burmah. B. M. 



We possess ten examples of this species, of which seven 

 belong to the dry-season form and exhibit the heavily black 

 striated under surface which seems peculiar to this species. 

 The female which I figured is that sex of /. verna (a white- 

 winged species), which fact probably confused the late 

 Capt. Watson, who regarded the present species as a form of 

 /. pyrene rather than /. rhexia (to which it is much more 

 nearly related) ; also, not having taken special notes of the 

 type specimens, he erroneously identified the wet form of the 

 species as typical, and (not possessing the dry form of the 

 male) naturally concluded that the species was based upon an 

 extreme seasonal form of /. pyrene. The seasonal forms of 

 /. latifasciatus hardly differ on the upper surface ; the border 

 varies slightly in width in examples both of the wet and dry 

 forms, one of our wet-season males showing a rather narrower 

 border to the secondaries than any of our dry-season examples. 

 Apart from the ground-colour of the wings this species is not 

 at all unlike /. verna. 



14. Ixias Birdi. 



(5 . Ixias Birdi, Distant, Ann. & Mag. Nat. Hist. ser. 5, vol. xii. p. 351 

 (1883) ; Rhop. Mai. pi. xxvi. fig. 4 (1882-86). 



^ . Allied to the preceding species, slightly smaller, with 

 the orange belt on the primaries sharply defined and more 



