I consider this to be an isolated modification of P. Theseus, Cr., peculiar to Borneo. It possesses all the characteristics of a female of this species.
Hab. Banjarmassing (Borneo) (Leyden Museum).
N.B. The 2nd, 3rd, and 4th forms of ♀ are all tailed, as in the females of P. Pammon.
64. Papilio Alphenor, Cramer.
P. Alphenor, Cr. Pap. Ex. t. 90. f. B (♀); Boisd. Sp. Gén. Lép. p. 274 (♂, ♀); P. Ledebouria, Eschsch. Voy. Kotz. t. 3. f. 7.
This is very closely allied to P. Theseus. The male is larger, has the caudal tooth scarcely perceptible, and on the under side has white instead of red marginal lunules. The female is tailed, much larger than P. Theseus ♀ form 2nd, from which it further differs by the white patch on the hind wings having the red markings blended with it, and more prominent.
Hab. Celebes, Bouru, Amboyna, Ceram (Wall.), Philippine Islands.
1st form of female (P. Ledebouria, Eschsch.).
Like the male, but with a brown tinge and an obscure anal lunule. This has been noticed only in the Philippine Islands.
2nd form of female (P. Alphenor, Cr.).