396 On a new Butterfly from Burma. 





LVI. — Description of a new Nymphaline Butterfly from 

 Burma. By Lionel de Niceville, F.E.S., C.M.Z.S., &c. 



Mr. H. J. Elwes has 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 Doubledaii, Westvvood, the hitherto 

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



Neurosigma nonius, sp. n. 



Bab. Karenni, Burma. 

 Expanse, <$ 3*2 inches. 



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

 same sex of N. Doubledaii, 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 N. Doubledaii the discal area of the wing occupying half 

 the surface is fulvous. Underside : both wings present 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 Doubledayi. It seems to me distinct 

 from the Sikkim form, of which I took dozens in the Chitta- 

 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 Doubledayi, 

 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 others." As, however, both sexes of N. Doubledaii are 

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

 collection, I do not think that Mr. Elwes'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. nouius is discovered, that it closely resembles 

 its male and has no fulvous coloration whatever on the hind 

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

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



