633 



DESCRIPTIONS OF TWO NEW SPECIES OF BUTTER- 

 FLIES FROM UPPER BURMA. 



By Lionel db Niceville, f.e.s., c.m.z.s., &c. 



1. CASTALIUS ROXANA, n. sp. 

 Habitat: North Shaa States ; North ChinJIills. 

 Expanse : ^,1*0 inch. 

 Desceiption : Differs from C. roxus, Godart, in having the 



white area on the upperside of the forewing somewhat larger ; in the 

 ihindwing the white area is twice as extensive, permitting the appear- 

 ance of the three pairs of black spots near the margin which in 

 C. roxus are lost in the outer black area occupying nearly half the 

 surface ; on the hindwing on the underside there are two black spots 

 only in the middle of the submarginal series, in C. roxus there are 

 three ; and the marginal series of white spots on both wings are 

 far more prominent in C. roxus than in C. roxana, 



2. PAPILIO (Byasa) POLLA, n. sp. 

 Habitat : North Shan States ; North Chin Hills. 

 Expanse: $, 5*0 inches. 



Desceiption : Differs from P. latreillei, Donovan, on the upper= 

 side of the hindwing in the discal white patch being larger (placed 

 further from the outer margin), extending into the discoidal cell 

 instead of ending (as a rule) considerably before the end, and occupy- 

 ing anteriorly an additional interspace, in P. latreillei the patch is 

 bounded in front by the discoidal nervule, in P. polla it reaches the 

 second subcostal nervule ; by the outer margin and the end of the tail 

 being broadly edged with carmine instead of having black cilia ; on 

 the underside of the hindwing in P. latreillei there is invariably a 

 small white marginal spot in the subcostal interspace which is wantino' 

 in P. polla ; sometimes in P. latreillei there are two small white spots, 

 sometimes one only, usually none, in the discoidal interspace in con- 

 tinuation of the discal white patch, these in P. polla being developed 

 into a very large quadrate white spot, which is, in fact, much the 

 largest spot of the four forming the patch ; the broad carmine margin 

 is also very distinctive of P. polla^ being wholly absent in the allied 

 species. 



N.B. — The two butterflies briefly diagnosed above will be more 

 fully described and figured hereafter. 



