450 L. de Niceville & Dr. L. Martin— Butterflies of Sumatra. [No. 3, 
314. Simiskina proxima, de Niceville. 
8. proxima, de Niceville, Journ. Bomb. Nat. Hist. Soo., vol. x, p. 29, n. 13, pi. S, 
figs. 19, male ; 20, female (1895). 
Near to S. potina , Hewitson, from Burma and tlie Malay Peninsula. 
A single pair of this species is in Dr. Martin’s collection, the male ob¬ 
tained by Herr Ude at Bohorok in Eastern Sumatra in September. 
315. Simiskina procotes, de Niceville. 
S. procotes, de Niceville, Journ. Bomb. Nat. Hist. Soo., vol. x, p. 32, n. 14, 
pi. S, fig. 21, female (1895). 
Near to S. potina , Hewitson, from Burma and the Malay Peninsula. 
Described from a single female taken in July at Bekantschan. The 
remarks regarding Poritia given above apply equally well to the genus 
Simiskina. With the exception of S. proxima , de Niceville, of which 
Dr. Martin took a female in April, 1890, very near the sea at the 
Saentis Estate, all occur in the outer mountains higher than Namoe 
Oekor. All the species are very rare, but appear to occur more fre¬ 
quently from June to August. 
316. Pithecops htlax, Fabricius. 
Snellen as Plebejus [sic] hylax. Hagen. Staudinger. In large 
forest, also wherever a small piece of jungle is left in young forest, 
will P. hylax be found flying so quickly that the eye of the collector 
cannot always follow the little animal. In shadow it is soon lost to 
view, but becomes visible again when passing one of the errant sun¬ 
beams of the forest. It prefers low elevations and occurs throughout 
the year. 
317. Pithecops marl®, de Niceville. 
P. marix, de Niceville, Journ. A. S. B., vol. lxiii, pt. 2, p. 30, n. 26, pi. iv, 
figs. 2, male-, 9, female (1894). 
Occurs from Namoe Oekor to the Central Plateau where P. hylax , 
Fabricius, is no longer found. Dr .Martin obtained the types in Septem¬ 
ber, 1893, from Bekantschan. It is nearly allied to, but quite distinct 
from, P. fulgens , Doherty, from Marglierita in Upper Assam, the only 
other species in the genus yet known which has the male of a brilliant 
blue on the upperside. When flying in the sun it looks like a sapphire 
taken to wings. 
318. ^Pithecops dionisius, Boisduval. 
Grose Smith. This species is, as far as I know, confined to the 
Papuan region. 
