1895.] L. de Niceville & Dr. L. Martin— Butter-flies of Sumatra. 
443 
and quickly get rubbed and worn. All tlie butterflies of the subfamily 
keep close to the ground, and rest with half-opened wings. 
Family LYCHDNIDiE. 
282. Gerydus gigantes, de Niceville. 
G. gigantes, de Niceville, Journ. A. S. B., vol. lxiii, pt. 2, p. 23, n. 19, pi. v, 
figs. 1, male ; IS, female (1894). 
Dr. Martin obtained the type of this species in October, 1892, from 
the mountains caught by the Battak collector Si-Ketjap, and later on 
Dr. Martin took several specimens himself at Namoe Oekor in August 
and November, so this fine and large species probably occurs from the 
latter place to the Central Plateau. On the wing it greatly resembles 
some species of Pierinse, and will certainly when flying be always taken 
by collectors for an insect of that subfamily. It is found also in Penang, 
and is the largest and most distinct species in the genus. More than 
half the surface on the upperside in both sexes is pure chalky-white. 
283. Gerydus symethus, Cramer. 
Grose Smith. Hagen. Occurs everywhere from near the sea to 
the elevation of Namoe Oekor, even near houses, in orchards, and in 
cocoa-nut plantations. It is common every year at Bindjei in November 
and December. 
284. Gerydus gallus, de Niceville. 
G. gallus, do Niceville, Journ. A. S. B., vol. lxiii, pt. 2, p. 25, n. 21, pi. v, fig. 11, 
female (1894). 
The figure of this species has not been well reproduced, the ochreous 
and ferruginous mottlings of the underside not being shewn at all. 
The white band on the upperside of the fore wing is also shewn too 
narrow. It differs from G. symethus , Cramer, in many particulars, but 
chiefly in having no whitish colour within the oblique discal white 
band on the upperside of the forewing, whereas in G. symethus the 
base of the wing up to the discal band is bluish-grey instead of brown. 
It is rare near Selesseli, but is more plentiful in the lower hills and 
outer spurs of the mountains. 
285. Gerydus biggsii, Distant. 
The G. gopara , de Niceville, is probably the same species. It is 
nearly as common as G. symethus , Cramer, but is found at a higher ele¬ 
vation, from Namoe Oekor to Bekantschan. 
J. ii. 56 
