Lepidoptera of Sikkim. 411 
anal angle, so that it might well be supposed to belong 
to a different species from the Sikkim one. This specimen 
mimics Delias belladonna vay. ithiela so well that until 
it was set I did not recognise it as thestylis. From 
Burmah and Tenasserim I have fifteen males, of which 
some are like the Sikkim watsoni and some the extreme 
form of it. Moller is of opinion that they cannot be 
separated in Sikkim, and I agree with him; but I could 
not at present decide as to the Tenasserim insect. My 
Sikkim females show much variation in the amount of 
yellow on the upper side, and I have seen no specimen 
like that described by Wallace. 
The males are not uncommon in Sikkim up to 4000 
or 5000 ft. throughout the season ; the females rarer. 
361. Prioneris clemanthe. 
Pieris clemanthe, Doubl., Ann. Nat. Hist., xvii., p. 28 
(1846), 
Occurs, but not commonly, in the lower valleys from 
April to October ; the female, however, seems quite rare. 
362. Catopsilia pyranthe. 
Papilio pyranthe, Linn., Mus. Ulr., p. 245 (1764). 
Callidryas pyranthe, Boisd., Sp. Gen., i., p. 611 (1836). 
Comnion up to 3000 ft. from March to December. 
363. Catopsilia gnoma. 
Papilio gnoma, Fab., Syst. Ent., App., p. 828, 3 
(1775). 
P. philippina, Cram., Pap. Ex., iv., t. 361, c, D (1782). 
Not uncommon up to 3000 ft. from March to December. 
364. Catopsilia catilla. 
Papilio catilla, Cram., Pap. Ex., iii,, t. 229 D, E (1782). 
Not uncommon up to 5000 ft. from March to December. 
3865. Catopsilia crocale. 
Papilio crocale, Cram., Pap. Ex., i., t. 55 C.D 779). 
I have no specimens from Sikkim, but I have it from 
Nepal and Bhotan, so that I have no doubt it occurs 
occasionally, if not regularly. 
