PAPILTO. 533 
blancliatre sur le disque de ses ailes inforieures en dessous, alors que cette partie dea ailes est 
precisement la plus obscure dans les especes voisines." (ObertJiiir, I. c.) 
Female. Primaries rather paler than those of the male, and without the patches of long silky-black 
hairs, but similar to that sex in all other characters. 
Expanse, d 108-120 millim., ? 118-130 millim. 
This species is onlj- separable from P. lianor by its narrower second- 
aries, the entire absence of bluish colour on the costal area, and the presence 
of a more or less well-defined pale patch on the disc of these wings. On 
the under surface the outer area of primaries is not paler than tlie rest of 
the wing. 
In his description of P. syfanius, M. Oberthiir refers to a whitish patch on 
the under surface of secondaries, but this is not represented in his figure of 
the species. This patch, which is placed at the end of the discoidal cell 
and is separated into three portions by the discoidal and upper discocellular 
nervules, is present in all the specimens of the species that I have seen. 
Sometimes it is white and conspicuous, but frequently it is suffused with 
fuscous and more rarely with greenish. In some of the specimens with well- 
defined white patches the interspaces above the patch are very pale, as in the 
example figured (Plate XXXII. tig. 5). 
Occurs at Ta-chien-lu, Wa-shan, Pu-tsu-fong, Chia-kou-ho, and Ni-tou in 
Western China during June and July, at elevations ranging from 5000 to 
9000 feet. 
Papilio arcturus. 
Papilio arcturus, Westwood, Arc. Eut. i. p. 101, p], xxvii. (1813). 
" P. alls nigris, viridi-atomosis ; posticis obtuse dentatis et late caudatis ; anticis striga interrupts 
macularum ex atomis viridibus formata, ex angulo postico ad partem dimidiam alarum ducta 
et cum margine subparallela ; posticis supra, plaga magnitudine mediocri, versus angulum 
externum Isete cserulea strigaque ejusdem coloris ex ejus apicem ad marginem alarum 
extensa, luuulis tribus sanguineis, maculaque ocellari (medio nigro) et lines transversa san- 
guineis ad angulum analem, ilia cum striga curvata viridi-atomosa corouata ; alis subtus 
nigricantibus basi albido-atomosis, anticis striga lata subapicali cinerea, venis lineisque 
intermediis nigris ; posticis luuulis 5 rubro-fulvis (cteruleo-pulverosis) maculisque duabus 
magnis rubro-fulvis (medio nigris et lunula supera cserulea ornatis) ad angulum aualem. 
" Expans. alar, antic, unc. 5. 
" Inhabits the Himalayan Mountains, Sylhet, and the adjacent parts of India." (Westivood, 1. c.) 
I have received this species from Ichang, Central China, and from Moupin, 
Omei-shan, Wa-shan, and Chia-kou-ho in Western China. The specimens 
vary considerably in size, and probably represent two broods. 
