♀, 1st form, _P. Emalthion_, Cat. of Lep. Brit. Mus. pl. 5. f. 4. ♀, 2nd form, _P. Rumanzovia_, Eschsch. Voy. Kotz. t. 2. f. 4; _P. Descombesi_, Boisd. Sp. Gén. p. 197; _P. Floridor_, ♀. Godt. Enc. Méth. ii. p. 809. _Hab._ Philippine Islands. _Remarks._—I have no doubt whatever that we have here another case of dimorphism, and I therefore unhesitatingly place these supposed species under one name. The male of _P. Emalthion_ very closely resembles the next species (_P. Deiphontes_), and the 2nd form of female (_P. Rumanzovia_, Eschsch.) as closely resembles the female of the same species; so that there can be no doubt that Godardt was right in describing them as the sexes of his _P. Floridor_. The female figured in the British Museum Catalogue is intermediate between these, but has more of the characters of the male; and it is to be remarked that both these forms of female have arrived in Europe accompanied by the same male. I am therefore obliged to reduce by one the hitherto received species of Philippine Papilios. 48. PAPILIO DEIPHONTES, n. s. _P. Deiphobus_, var. A., Bd. Sp. Gén. Lép. p. 201. ♂. _Above_: exactly as in _P. Deiphobus_, but having a small tooth only in place of the tail, and the posterior band of a clear ashy blue. _Beneath_: with the markings as in _P. Emalthion_, except that the red patch at the base of the upper wings is smaller. ♀. Also tailless, but resembling in markings the same sex of _P. Deiphobus_, the pale patch on the upper wings not extending into the discoidal cell. Expanse of wings, ♂, 5½ inches; ♀, 5¾ inches. _Hab._ Batchian, Gilolo, Ternate, Morty Isl. (_Wall._). 49. PAPILIO DEIPHOBUS, Linnæus. _P. Deiphobus_, L., Cramer, Pap. Ex. t. 181. f. A, B; Donovan, Ins. Ind. pl. 17. f. 2; Lucas, Lep. Ex. t. 11; Boisd. Sp. Gén. Lép. p. 200. ♀, _P. Alcandor_, Cr. Pap. Ex. t. 40. f. A, B. _Hab._ Ceram, Amboyna, Bouru (_Wall._). _Remark._—A simple variety of both this and the last species frequently occurs, in which all the markings on the under side are ochre-yellow instead of red. 50. PAPILIO ASCALAPHUS, Boisduval. _P. Ascalaphus_, Bd. Sp. Gén. Lép. p. 200 (♂); De Haan, Verh. Nat. Gesch. p. 26, t. 1. f. 2 (♀). _Hab._ Menado, Macassar (Celebes), Sulla Isl. (_Wall._). 51. PAPILIO ŒNOMAUS, Godardt. _P. Œnomaus_, Godt. Encyc. Méth. ix. p. 72; Boisd. Sp. Gén. Lép. p. 190; De Haan, Verh. Nat. Gesch. p. 24, t. 4. f. 1 (♂), 2 (♀). _Hab._ Timor (♂, ♀) (_Wall._). _Remark._—As has been already noticed (p. 22), the female of this species closely resembles _P. Liris_ ♀, in company with which it was captured. g. _Helenus_ group. 52. PAPILIO SEVERUS, Cramer. _P. Severus_, Cr. Pap. Ex. t. 227. f. A, B (♂), t. 278. f. A, B (♀); Boisd. Sp. Gén. Lép. p. 212. _Hab._ Bouru, Ceram, Amboyna, Gilolo, Batchian, Aru Isl. (_Wall._).