1885. J L. de Niceville — List of ButterfltGS from Sihhim. 3 



Family LYC^NID^. 



294. Cyaniris marginata, de N. 



I took a single male at about 3,000 feet elevation. 



295. Nacaduba atrafa, Horsfield. 

 Three males. 



296. Nacaduba prox. viola, Moore. 



A single male. N. viola is recorded from Ceylon, but I have not 

 seen a specimen from that locality. The expanse given for the ^ is ^^ 

 of an inch, while the Sikkim specimen measures 1^% inches. The white 

 bands on the underside as described by Mr, Moore appear to differ also : 

 in N. viola the two inner and the outer ones are short ; in the Sikkim 

 specimen it is only the middle pair on either side of the discocellular 

 nervules which are short, the other two pairs extending nearly across 

 the wing. 



Nacaduba ardates, Moore. 



Mr. Distant in his recent work ' Rhopalocera Malayana ' has divided 

 the Lyccenidce into three groups, the first of which (Guretaria) lacks 

 " filamentous tail-like appendages " to the hindwing, while the other 

 two groups (Gastalaria and ApJmaria) possess these tails. This year 

 I took many specimens of a Lycsenid in company with N. ardates 

 which differed in no way from that species except in having no tails. 

 On careful microscopic examination of these tailed and tailless forms, 

 I can find no difference between them in respect of the venation ; 

 and as the markings are precisely similar, I conclude that they are one 

 and the same species. Mr. Distant, in forming his three groups (p. 196), 

 says that the presence or absence of the tail " may prove to be an un- 

 certain and illusory divisional character " as an American naturalist has 

 recorded that certain North American species have a tailless spring 

 brood, and a summer tailed generation. In Sikkim, at any rate, both 

 forms occur together, and in equal perfection as to condition. I have 

 also received both forms from Orissa, collected by Mr. W. C. Taylor. 

 Another species {N. dana, de N.) which when describing it I placed 

 doubtfully in the genus Nacaduba has the venation of that genus, but no 

 tails. It occurs at Buxa in Bhutan, in Sikkim, at Bholahat in the Mai da 

 district, in the Chittagong district, and at Ootacamund. 



297. Catochrysops bengalia, de N. 

 One male. 



298. Sithon indra, Moore. 

 One female. 



299. Sithon mandarinus, Hewitson. 

 One male. 



