Lepidoptera of Sikkim. 315 
nearly allied species or form L. hyrania, Koll., which 
replaces dinarbas in the North-west Himalaya. Hewit- 
son’s type-specimens, which are perhaps faded, show 
but little difference between the two, but in fresh 
Sikkim specimens the ground colour of the under side 
is much deeper, and the pattern and ocelli more strongly 
marked than in hyrania. Lethe brissanda, de Niceville, 
is a nearly allied species found with dinarbas at Buxa, 
and Debis Davidis, Oberthiir, which is also a close ally, 
represents it in Eastern Tibet. 
40. Lethe rohria. 
Papilio rohria, Fab., Mant. Ins., ii., p. 45 (1787). 
Lethe rohria, Butt. Ind., p. 156. 
Common in the low valleys up to 5000 ft. from April 
till November. 
41. Lethe verma. 
Satyrus verma, Koll., Hugel’s Kash., iv., p. 447, 
t. xvi. (1848). 
Tansima verma, Moore, P. Z.8., 1882, p. 235. 
Lethe verma, Butt. Ind., p. 158, t. x., fig. 28, 3. 
Not uncommon up to 8000 ft. between April and 
November, but commonest at about 4000 ft. in the 
rains. 
42. Lethe Mason. 
Debis Masoni, Elwes, P.Z.S., 1882, p. 405, t. xxv., 
2 
fig. 2. 
Lethe Masoni, Butt. Ind., p. 159. 
This species has as yet only been found in the interior 
to the eastward by my native collectors, probably in 
Bhotan or the Chumbi valley. Debis episcopalis, 
Oberthur, from East Tibet, is an allied though perfectly 
distinct species, having the fore wing with a narrow 
white transverse band above, and the base reddish 
brown below. 
43. Lethe siderea. (Pl. IX., fig. 8). 
Lethe siderea, Marsh., J. A. 8. B., 1880, pt. ii., p. 246; 
Butt. Ind., p. 159. 
This species has hitherto only been found on Tendong, 
in Native Sikkim, by Méller’s collectors at about 7000 ft. 
