1895.] L. de Niceville & Dr. L. Martin — Butterflies of Sumatra. 517 



Heer M. C. Piepers in Tijd. voor Ent., vol. xxxi, p. 350, pi. viii, fig. 



5(1888). 



586. Papilio (Iliades) forbesi, Grose Smith. 



P. forbesi, Grose Smith and Kirby, Rhop. Ex., vol. i, pi. Papilio i, figs. 1, 2, 

 male (1887); id., Martin, Nat. Tijd. voor Neder.-IndiS, vol. liii, p. 335, n. 2 (1893). 



Grose Smith. Hagen. The male is somewhat variable, on the 

 upperside of the hindvving in some specimens the usual four anal grey 

 lunules are almost obliterated. There are two forms of female: — 



I. Forewing almost as in the male, somewhat paler only except 

 the inner margin broadly towards the base. Hind wing with the anal 

 half not quite touching the discoidal cell creamy-white, this area ending 

 anteriorly at the second subcostal nervule ; bearing in the submedian 

 interspace an oval black spot which inwardly touches the narrow black 

 abdommal margin, two conical equal-sized spots in the median inter- 

 spaces, a conical but smaller spot than the two which precede it in the 

 discoidal interspace; the margin bears five large black spots, of which 

 those in the median interspaces alone are free. Underside, forewing 

 somewhat paler than in the male. Hindwing has the basal red streaks 

 as in the male, the large creamy- white area spotted with black as on its 

 own upperside, but in the upper subcostal interspace there is an addi- 

 tional oval small whitish spot crowned with a few turquoise-blue scales, 

 with some similar scales in the interspace above. 



II. Similar to Form I, but the forewing has a creamy- white 

 epaulette as in the Form II of the female of P. memnon, Linnaeus, in 

 Sumatra. It is possible that this form of P. memnon may mimic Form II 

 of P. forbesi. 



P. forbesi is found on the Central Plateau only, at a not less eleva- 

 tion than 3,000 feet above the sea, and flies all through the year. The 

 male is common, and is caught on the sandy banks of hill streams ; the 

 female of both forms is excessively rare, Dr. Martin obtaining five 

 specimens only. The first male was obtained by Mr. H. O. Forbes near 

 Lake Ranau in Benkoelen quite in the south of Sumatra, the females 

 described in 1893 by Dr. Martin were obtained in the previous year. 



587. Papilio (Laertias) polttes, Linnseus. 



Snellen as pammon and polytes. Grose Smith as pammon and 

 polytes. Hagen. Wallace as theseus. Kirby as niuna, Weber, and 

 antiphus, De Haan (nee Fabricius). Distant. Dr. Wallace separates 

 off the Sumatra, Java, Borneo, Celebes, Lombock, and Timor form 

 from the India, Ceylon, China, and Malay Peninsula form, true P. polytes, 

 under the name of P. theseus, Cramer, which differs in the male being 



