226 On a new Papilio from Bali. 
B. Upperside, both wings blue-black. 
a. Upperside, hind wing strongly marked with longitudinal cream- 
coloured stripes on either side of the longitudinal black veins. 
8. P. noctula, Westwood: Borneo. 
b. Upperside, hind wing uniform blue-black. 
a', Hind wing broad, deeply indented on the outer margin between 
the veins, with broad creamy-white cilia. 
4. P. nyx, de Nicéville: Bali. 
bo’. Hind wing narrow, shallowly indented on the outer margin 
between the veins; the cilia just touched with white in the 
middle of the internervular indentations. 
5. P. erebus, Wallace: Malay Peninsula, Sumatra, Borneo. 
Papilio (Pangerana) nyx, sp. n. 
Hab. Bali. 
Expanse, 2, 5:0 inches. 
Female.— Upperside: both wings black, with a very slight 
blue gloss. Fore wing with the apex white, this white area 
bounded anteriorly by the second subcostal nervule, ex- 
tending slightly into the anterior outer end of the discoidal 
cell, not reaching the apex and outer margin, and ending 
posteriorly about the third median nervule; this white area 
bears narrow streaks of the ground-colour between the veins ; 
cilia creamy white. Hind wing unmarked; cilia broadly 
creamy white, this colour extending slightly on to the wing 
in the internervular indentations. Underside: both wings 
fuscous, without gloss. Fore wing with the white area more 
extensive, bounded anteriorly by the first subcostal nervule, 
and reaching nearer to the apex and outer margin; an 
obscure reddish streak on the middle of the costa anterior to 
the costal nervure; cilia creamy white. Hind wing un- 
marked ; cilia creamy white, that colour extending much 
more broadly on to the wing than on the upperside, especially 
so on either side of the apices of the veins. Talpi, head 
and thorax at the sides, and abdomen at the apex crimson. 
This species differs from the same sex of P. erebus, Wallace, 
in having the fore wing broader, the apical white area larger, 
the cilia creamy white instead of black, and the ground- 
colour less blue. The hind wing is markedly broader, the 
incisures much deeper, and the cilia broadly creamy white ; 
in P. erebus the cilia are only just touched with white between 
the veins, otherwise black. 
This interesting species was captured by Mr. William 
Doherty in March 1896, at 2000-4000 feet, in the island of 
Bali, which is only separated from Java on the east by a 
narrow strait. I am indebted to Mr. H. J. Elwes for the 
gift of the specimen described. He has doubtless other 
specimens in his collection. 
Indian Museum, Calcutta, 
May 22nd, 1897. 
a eee eee 
