Lepidoptera of Sikkim. 383 
the name of dipora, Moore. It seems rare in Sikkim at 
low elevations, but is very common in the Khasia hills 
in August and September at 4—6000 ft. on the grassy 
downs, and I have taken it also at Galle, in Ceylon. 
A comparison of my Indian series, namely, ten pairs — 
from the N.W. Himalaya, six pairs from Khasia, three 
from Ceylon, and one from Java, with six pairs from 
Japan, two from Shanghai, and twelve from Germany, 
leads me to doubt whether parrhasius and argiades can be 
distinguished with certainty. The summer brood in the 
Himalayas and Khasias are certainly darker below, and 
have a broader dark border to the wings above than 
argiades. The red patch on the anal angle of hind wing 
below is also better marked ; but the spring brood in 
the N.W. Himalaya differ from the summer one as the 
German spring form (polysperchon) does from argiades, 
and I see no alternative between placing them all under 
one species, or separating several local races which do 
not, as far as my material serves me, seem to be con- 
stant. 
257. Jamides bochus. 
Papilio bochus, Cram., Pap. Ex., iv., t. 391, ©, p 
(1782). 
Common at low elevations in Sikkim, and also found 
in great numbers on sunny days in June on the top of 
Sinchul and other wooded ridges up to 8 or 9000 ft., 
where it probably ascends from below, as the insect is a 
purely tropical one, and I doubt its breeding in these 
cold, damp, misty forests, though on some occasions it 
seemed to be quite at home there. 
258. Chilades laius. 
Papilio laius, Cram., Pap. Ex., iv., t. 819, p, B (1782). 
Polyommatus varunana, Moore, P. Z.8., 1865, Dall 2; 
t. 41, fig. 6. 
Chilades varunana, Moore, Lep. Ceyl., p. 77, t. 35, 
fig. 3; Wood-Mason & de Nicé., J. A. S. B., 1886, 
p- 365. 
Only occurs in the Terai. According to de Nicéville 
C. laus is almost certainly the cold and dry-weather 
form of varunana. 
2d2 
