OF THE MALAYAN REGION. 41 



Hemarlcs. — I liave been in niucli doubt about tlie position of tliis remarkable species, 

 and was for some time inclined to place it among the Papilios. It agrees, liowever, far 

 better with Oniitliopfera in tlic form and stoutness of the wings, the long stout and 

 curved antenna?, the red collar and patches at the base of the wings beneath, the abdo- 

 minal fold, and the flight and general appearance. It is powerful on the wing, and 

 occasionally settles on the ground in damp sunny places. It inhabits the interior of 

 Xorth-west Borneo and the mountains of West Sumatra. The female is unknown. It 

 is peculiar in the great length of the discoidal cell of the wings and its altogether 

 unique style of coloration, and must be considered as the type of a distinct group of 

 the genus Ornithoptera. 



Papilio. 



This is without doubt the finest and most remarkal)le genus of Diurnal Lopidoptera. 

 About 360 species are uoav known, all, except ten, being tropical or subtropical. I have 

 given at p. 23 the characters of the sections and groups into which I divide the Ma- 

 layan species. 



Section A. 



a. Nox group. 



17. Papilio Nox, Swainson. 



P. ^'vx, Sw. Zool. 111. pi. 102; Ilorsf. Lep. Ins. E. I. C. pi. 1. f. 1 ; Boisd. Sp. Gen. Le'p. p. 2n- 

 r. Xeesius, Zink. Nov. Act. Acad. Nat. Cur. xv. t. 14. f. 1. 

 Hab. Java (d, ?) {JFall.), Penang (J) {Brit. Mus.). 



18. Papilio Xoctis, Hewitson. Tab. V. fig. 1 (c?)*. 



P. Noctis, Hewlts. Proc. Zool. Soc. 1S59, p. 42.?, pi. GG. f. 5 ( ? ). - 



Male : differs from the same sex of P. Nox by the broader apex of the fore wings, and 

 by the hind wings being more elongate, more glossy, and especially by the entire non- 

 dentated hinder margin. 



Hab. Borneo (Sarawak) [Wall.], (d, ? Mns. nost.) 



19. Papilio EpvEbus, Wallace. 



P. Nox, var., De liaan, Vei'h. Nat. Gescli. t. 5. f. 3 (2). 

 Hab. INIalacca [Wall.), Banjermassing, Borneo [De Haan). 



. liemarks. — I am somewhat doubtful of the species, the female only being known ; but 

 it differs so strikingly from the same sex of P. No,v and P. Noctis (the former of which 

 seems very constant), that I think it better to separate it in order to draw attention to 

 other specimens that may exist in collections. It ditfers from P. A'ac ( 2 ) by its narrower 

 and more elongate hind wings, which are black, glossed with steel-blue ; the fore wings 

 are black, with the veins beyond the cell clearly white-margined. The lower margin is 

 also much less strongly dentated. 



* In all the Plates, the wings on one side of each figure are detached from the bod}', and represent the under surface 

 of the same Insect. In one case only (Tab. YII. f. 1 .) the upper surfaces of two varieties of the same species are given. 

 VOL. XXY. G 



