396 On a new ButterAy from Burma. 



LVI. — Description of a new Nymphaline Batter jit/ from 

 Burma. By LIONEL DE NiCKVILLE, F.E.S., C.M.Z'.S., &c. 



Mr. H. J. Elwes lias kindly sent me a specimen of a species 

 of the Nymphaline genus Neurosigma from the Karenni 

 country, lying to the north-east of the Burmese province of 

 Pegu, which, as it undoubtedly represents a new species 

 distinct from Neurosigma Douhledaii, Westwood, the hitherto 

 unique species in the genus, I describe as follows : — 



Neurosigma nonius^ sp. n. 



Hah. Karenni, Burma. 



Expanse, ^ 3*2 inches. 



Description. — Male. Upperside: fore wing differs from the 

 same sex of N. Douhledaii, Westwood, from Nepal, Sikkim, 

 Assam, and Upper Burma, in having the fulvous coloration 

 of the ground confined to the basal third of the wing, the 

 ground-colour of the rest of the wing being creamy white. 

 Hind wing has the ground-colour everywhere creamy white, 

 in iV. Douhledaii the discal area of the wing occupying half 

 the surface is fulvous. Underside : both wings ])resent the 

 same differences as on the upperside, in addition to which all 

 the black markings are of a deeper and richer shade and larger. 



Female unknown. 



Mr. W. Doherty, who captured numerous male specimens 



of this species in March and April, 1890, recognized it as a 



new species, as he wrote to Mr. Elwes : — " 1 send many 



males of Neurosigma Douhledayi. It seems to me distinct 



from the Sikkim form, of which 1 took dozens in the Ghitta- 



gong hill-tracts, all black and fulvous above." Mr. Elwes, 



however, in Proc. Zool. Soc. Lond. 1891, p. 277, did not 



describe it as new, but refers to it as Neurosigma Douhledayi, 



var. ?, and figured it on pi. xxvii. fig. 7, as he thought it 



might be " a case of male dimorphism in which the male and 



female are different in some localities and resemble each other 



in otiiers." As, however, both sexes of N. Douhledaii are 



known and have been figured, and both are represented in my 



collection, I do not think that Mr. Elvves's suggestion is 



likely to prove correct, although we know only one sex of 



the Karenni local race. It will be most probably found, when 



the female of N. nonius is discovered, that it closely resembles 



its male and has no fulvous coloration whatever on the hind 



wing, while the female of N. Douhledaii has a small patch of 



that colour in the middle of that wing on both surfaces. 



