1895.] L. de Niceville & Dr. L. Martin —Butterflies of Sumatra. 405 
or apparently so, as they are excellent mimics of species of JErgolis, 
and are doubtless often passed over as such by the collectors. The 
males like to go to small muddy or swampy spots on the roads, where 
they are easily “ potted ” with a net. The females are never seen on 
the roads, but fly like JErgolis through the jungle. The male of this 
butterfly does not exhibit any very gorgeous coloration, but nevertheless 
it has a beauty of its own owing to the deep velvety-black colour of the 
upperside, which is so exceedingly delicate and so like the bloom on a 
peach that one never sees an absolutely perfect specimen in a collection. 
It is especially common on roads cut through the red hills on the 
banks of the Whampoe river, also in Serdang and Padang Bedagei. 
142. Apatura ( Bohana ) artaxes, de Niceville. 
A. ( Bohana ) artaxes, de Niceville, Journ. Bomb. Nat. Hist. Soc., vol. ix, p. 261, 
n. 3, pi. N, figs. 3, male ; 4, female (1895). 
This species is restricted to the Central Plateau, from whence 
Dr. Martin obtained his first female specimens in October and December, 
1893. As the males are very similar to the same sex of the foregoing 
species, they escape the nets of the Battak collectors, and Dr. Martin 
only obtained two in thirteen years. Many more females than males 
have been obtained. It would be interesting to know if the female is a 
mimicker, and if so, what species is mimicked. 
143. Eulacura osteria, Westwood. 
Staudinger. Rare in Sumatra, and occurs only at Selesseli and 
Namoe Oekor in July. The female is rather rarer than the male. Both 
sexes settle on the underside of leaves with wide-spread wings, and 
never fly long distances. It is a common butterfly in the Botanical 
Gardens at Singapore. 
144. Hestina nama, Doubleday. 
Hagen as nama , Boisdnval [sic]. Staudinger. Occurs in Perak 
in the Malay Peninsula. 
145. Hestina caroling, Snellen. 
H. carolinse , Snellen, Tijd. voor Ent., vol. xxxiii, p. 218 (1890); idem, id., l.c., 
vol. xxxvii, p. 67 (1890). 
Snellen. Both species of Hestina occur in our area only in the 
hills and on the Central Plateau, the lowest elevation at which they 
are found (except one male of II. carolinse which Dr. Martin caught 
near the iron bridge over the Bindjei river at Namoe Oekor) being 
Bekantschan. H. carolinse flies in May. U. nama doubtless mimics JDanais 
