Lepidoptera of Sikkim. 311 
My arrangement differs in some respects from that of 
Mr. de Nicéville, as I doubt whether his third group is a 
natural one, and, though it is very difficult to describe 
the characters by which some of the species of the 
sidonis group are separated, yet I find but little variation 
in any of the species except sidonis, of which the north- 
western form might well be separated from that found 
in the Khasia hills, if there were no intermediate links. 
I never found any of the most nearly-allied forms, 
such as nicetas, sidonis, nicetella, and maitrya, under 
circumstances which would lead me to suppose they 
interbreed : in all except the first, the females are very 
seldom seen. Out of hundreds of nicetella, maitrya, and 
sidonis, which I took myself, I only have one female of 
each of the two first, and five of sidonis; of siderea 
I never took either sex, and I think the female is 
unknown, as is also the case with tristigmata. 
28. Lethe scanda. 
Lethe scanda, Moore, Cat. Lep. E.I.C., i p. 218 
(857), +o Butt ind. 12, ps 139. 
Debis nada, Moore, l..c., p. 218, °. 
Zophoessa dirphia, Druce, Cist. Ent., 1., p. 357 
(1875), 2; Butt. Ind.,1., p. 168. 
This species is not uncommon in the dense virgin 
forest on Tendong and near Rikisum, and rarer on the 
flanks of Sinchul from 6 to 8000 ft., in the months of 
July and August. I have, however, taken a single 
female in the end of June, but this sex is always rare, 
and flies but little. Having seen the type of Z. dirphia, 
I can say that it is identical with scanda. The species 
has not been found except in Sikkim and British Bhotan. 
29. Lethe bhairava. 
Lethe bhairava, Moore, Cat. Lep. E. I. C., p. 217 
(1857), 23 Butt. Ind.,,1-,.p..139. 
Debis anysis, Hew., Ex. Butt., vol. ili., Debis, t. i., 
fig. 1 (1862), 3. 
A rare insect in Sikkim, which I have only taken at the 
Rangbi Bridge in May, and on the flanks of Dhumsong, 
in British Bhotan, at 6000 ft., in August. Modller’s 
shikaris have taken it in June, and near Buxa, in Bhotan, 
