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. Papilto ( Iliades) forbest, G-rose Smith. 
P. forbesi, Grose Smith and Kirby, Rhop. Ex., vol. i, pi. Pajpilio i, figs. 1, 2, 
male (1887); id., Martin, Nat. Tijd. voor Neder.-Indie, vol. liii, p. 335, n. 2 (1893). 
Grose Smith. Hagen. The male is somewhat variable, on the 
upperside of the hindwing in some specimens the usual four anal grey 
lunules are almost obliterated. There are two forms of female : — 
I. Porewing 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 
abdominal 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 ) polytes, Linnasus. 
Snellen as pammon and polytes. Grose Smith as pammon and 
polytes. Hagen. Wallace as theseus. Kirby as numa , Weber, and 
antiphus, De Haan ( nec 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 
