444 L. de Niceville & Dr. L. Martin — Butterflies of Sumatra. [No. 3, 



286. Gerydus zinckenii, Felder. 



I possess one female example from Sumatra which agrees with, 

 typical Javan specimens of this species. It may be known by the 

 white area of the forewing on the upperside occupying half the sur- 

 face, its outer edge straight ; in G. symetJius, Cramer, and G. gallus, 

 de Niceville, the pure white area is much smaller, and is confined to 

 the disc, not reaching the base of the wing, with its outer edge very- 

 irregular. 



287. Gerydus g^tdlus, de Niceville. 



G. gsetulus, de Niceville, Journ. A. S. B., vol. lxiii, pt. 2, p. 24, n. 20, pi. v, 

 fig. 12, female (1894). 



On the upperside the forewing is precisely similar to that of 

 G. zinckenii, Felder, but the hindwing differs in that instead of being 

 dull fuscous throughout, half the surface is white, with a prominent 

 fuscous disco-cellular line. On the underside it hardly differs from 

 G. biggsii, Distant. It is rare, I have seen three females only taken in 

 July and October near Bekantschan. 



288. Gerydus uoisduvalt, Moore. 



Very rare, I possess one female only from Sumatra, which is cer- 

 tainly this species. 



289. Gerydus omsa, de NiceVille. 



O. g-rsa, do Niceville, Joarn. Bomb. Nat. Hist. Soc, vol. x, p. 26, n. 10, pi. S, 

 fig. 16, male (1895). 



May be known from all the described species in the genus by the 

 upperside being immaculate in both sexes. The underside is very 

 similar to that of G. biggsii, Distant. It is found from Bekantschan 

 to the Central Plateau in January, March and July. 



290. *Gerydus zymna, Doubleday and Hewitson. 



Grose Smith as Miletus zymna. The type of the genus Miletus 

 is " Papilio" polycletus, Linna?us, from the Moluccas. Mr. Druce has 

 monographed the genus in Trans. Ent. Soc. Lond., 1891, p. 179, but 

 unfortunately uses the name Hypochrysops, Felder, for it, of which 

 " Thecla " anacletus, Felder, also from the Moluccas, has been fixed 

 by Mr. Scudder as the type, and which species is congeneric with 

 Miletus polycletus. I may note here that a female example of M. ccelis- 

 parsus, Butler, described from Nias Island, off the west coast of Sumatra, 

 has been obtained on Penang Hill ("The Crag") by Mr. A. R. Adams, 

 and will almost certainly be hereafter obtained in the island of 



