Lepidoptera of Sikkim. 307 
Hewitson collection include both forms, and I do not at 
present see my way to distinguish them.  WNicotia, 
according to Méller, is rare, and occurs in the spring 
months only. 
26. Neorina margarite. 
Lethe? margarite, Elwes, P. Z. §., 1882, p. 405, t. xxv., 
Las 
Neorina margarite, Butt. Ind., p. 186. 
I am as yet uncertain whether this beautiful species 
occurs in Sikkim or not, as my first specimen was 
brought by native collectors from some place to the 
eastward of the Tista river; but Mr. Knyvett’s collectors 
have lately taken others of both sexes near Buxa, in 
Bhotan, and I have no doubt it occurs near to, if not 
within, British Bhotan, probably at the same elevation 
as N.hilda. The female does not differ except in having 
a rather broader band on the fore wing. 
27. Neorina hilda. 
Neorina hilda, Westw., Gen. Di. Lep., p. 370, t. Ixv., 
2 (1851), 3; Butt. Ind., i., p. 184. 
This lovely insect is one of those most characteristic 
of the dark gloomy oak and chestnut forests of the 
Eastern Himalayas, and occurs from the end of June 
till September at 7—9000 ft. It flies up and down the 
paths in dense forests, and settles on the ground or on 
tree-trunks, when it is not so conspicuous as it is on the 
wing. ‘The female is either much rarer or more seldom 
seen than the male; but I once saw one flying rapidly 
over the bare open top of the observatory-hill at Jella- 
pahar, which is a very favourite place for the females of 
many forest-loving butterflies to fly on sunny mornings 
in the rainy season, and, after a stiff race with a burly 
bombardier from the depot, who was a regular collector 
on this spot, I netted the prize. I found the species 
much commoner to the eastward in British Bhotan than 
in Sikkim, which is the most western locality we know 
for this species. 
The numerous species of Lethe which inhabit the 
dense forests of the Eastern Himalayas, and which are 
very characteristic of this region, are difficult to under- 
