398 MR. H.J. ELWES ON BUTTERFLIES FROM SIKKIM. [May 2 
margin a fine yellow streak as well ; close to it, at the base, a faded 
yellow spot is found. 
Head black ; palpi laterally white ; forehead with two white 
streaks ; top ef the head with four white points; antenne in the 
female brownish ; prothorax above with two yellow points ; abdo- 
men below and on the sides spotted yellow. 
EXPLANATION OF PLATE XXIV. 
Fig. 1. Papilio hahneli, p. 396. Fig. 3. Heliconius godmant, p. 397. 
2. Heliconius venus, p. 396. 
8. On a Collection of Butterflies from Sikkim. 
By H. J. Evwes. 
[Received April 24, 1882.] 
(Plate XXV.) 
When at Darjeeling in 1881 with Mr. Godman, I made arrange- 
ments with a native plant-collector, a Sikkim Bhotea, who had 
accompanied me on two expeditions into the interior, to visit the 
Chumbi valley, on the Tibetan frontier of Sikkim, to collect seeds 
and insects. This he did during the months of August and Sep- 
tember last; and through the kind assistance of my friend Mr. 
Gammie 1 have received a considerable number of Butterflies in 
papers in tolerable condition. Though I cannot be certain of the 
exact localities in which they were taken, I have little doubt, from 
my knowledge of the country and the plants which came with 
them, that a considerable portion of them were taken on the Tibetan 
side of the frontier, which has never been visited by any European, 
on account of the jealousy of the Tibetan officials. On two occasions 
I have looked down into this valley from passes 15,000—16,000 feet 
high on the Chola range, which bounds Sikkim on the north-east ; and, 
judging from what I saw and from the information we have obtained 
through native sources, it is a valley of somewhat different climate 
and vegetation from the Sikkim valley, theugh the Machu river, 
which drains it, flows southwards throngh Bhotan to the Bay of 
Bengal. It is said to be much drier in summer and colder in winter 
than Sikkim valleys of similar elevation; and as a number of the 
plants and butterflies I received are not known to occur on our side 
of the passes, I have no doubt that the collectors passed some part, 
at any rate, of their time in this valley. 
With the collection came a number of other species which occur 
at lewer elevations in Sikkim, and which were probably taken on 
the journey up. ‘This part of the expedition is often made to last as 
long as possible by these native collectors, who infinitely prefer to 
spend their advance-pay in feasting at some of the villages on their 
road to hard work in a cold climate on short commons. 
The most interesting species in the collection are Paleearctic forms, 
