188 Mr. A. G. Butler on Lepidoptera 



39. Ixias moulmeinensiSj Moore. 



S ?• Slieemagar, on the 12th December ; ^. Katha, 3rd 

 January ; $ . Myadoung, 4th January ; (^ !^ . On the river- 

 bank opposite Mandalay, 10th January. 



Either this species is slightly variable or it exhibits slight 

 local modifications, such as might eventually become perma- 

 nent, even if they have not already done so, and thus tend to 

 bridge over the already very slight gaps which separate the 

 species (local forms) constituting the genus. 



40. Catopsilia gnoma^ Fabr. 



? . Irrawaddy river, opposite bank to Mandalay, 10th 

 January. 



A small and peculiarly marked specimen, which, however, 

 I can associate with no other named form ; if constant in its 

 characters it might be separated as a distinct species. 



41. Catopsilia nephte^ Fabr. 



S . Myadoung (lat. 23° 43' N.) on the 4th January. 



42. Catopsilia ilea, Fabr. 

 (7 . Myadoung, 4th January. 



43. NycMtona xipTiia^ Fabr. 



Three specimens caught at Kyouk Myoung (lat. 22° 34' N.) 

 on the 21st December. 



44. Appias vacans^ Butler, 



A pair (both dwarfed) at Modah, on the Irrawaddy (lat. 

 24° 18' N., long. 96° 26' E.), on the 3rd January, 1886. 



The Ceylonese species identified as A. vacans in Mr. Moore's 

 work on the Lepidoptera of Ceylon is distinct, the much 

 greater width and dentate character of the border on the under 

 surface of the secondaries being alone sufficient to distinguish 

 it ; I therefore propose that it be called A. aperta. The pair 

 now received differ from my figure of the type chiefly in size, 

 and must I think be typiical ; unfortunately we do not possess 

 Darjiling examples. 



45. Ganoris gliciria, Cramer. 



^ . Modah, 3rd January. 



The specimen belongs to a somewhat rare sport, in which 

 the black spot of primaries is represented only by a i'cw black 

 scales. 



