1895.] L. de Niccville & Dr. L. Martin— Butterflies of Sumatra. 405 



or apparently so, as they are excellent mimics of species of Ergolis, 

 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 Ergolis 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 (Holland) artaxes, de Niceville. 



A. (Bohana) artaxes, de Niceville, Journ. Bomb. Nat. Hisfc. 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. 



Standinger. Rare in Sumatra, and occurs only at Selesseh 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, Boisduval [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., I.e., 

 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 H. carolinse which Dr. Martin caught 

 near the iron bridge over the Bindjei river at Namoe Oekor) being 

 Bekantschan. E, Carolines flies in May. H. nama doubtless mimics Danais 



