PAPiLio. 543 
Papilio nevilli. 
Papilio nevilli, Wood-Mason, Ann. & Mag. Nat. Hist. (5) ix. p. 105 (1882). 
Papilio {Panosmia) nevilli, Wood-Mason & de Niceville, Jouru. Asiat. Soc. Bcng. Iv. 
pt. ii. p. 37-i, pi. XV. figs. 2, 2 ad (1886). 
Papilio chentsong, Oberthiir, Etud. d'Eut. xi. p. 13, pi. i. fig. 1 (188G). 
" Posterior wings above with two large pink-wbite spots, one between the discoidal vein and the 
second branch of the subcostal, occupying all but the two ends of the space ; the other in the 
space next in front, smaller, and not extending so far towards the base of the space, and 
with three bright crimson submarginal lunulas, two subequal in the interspaces between the 
branches of the median vein, and the third between the third median veinlet and the dis- 
coidal vein, equal to, or slightly greater than, the other two taken together; below with a 
small pink-white spot between the first branch of the subcostal and the costal veins, furming 
with the two visible on both sides of the organs a series of three, all equally distant from the 
outer margin ; the submarginal lunules larger and subcqual and much lighter coloured, and 
with a fourth rather irregidar-shaped crimson spot, subequal to the lunules, aud divided into 
two unequal parts by the first median vein, at the end of the basal half of which it is 
• placed, with the tails weU-developed but not constricted at base." {Wood-Mason, I. c.) 
Silchar, Cachar. 
Var. chentsong, Oberthiir. " Je pense que le Papilio chcntsomj dont Mgr. Biet nous a envoye 
deux trts beaux males pris a Yerkalo, est une forme geographique de ravana dont il dift'ero 
par le retrecissement des taches blanches et rosees de ses ailes inferieures en dcssus, la 
coloration plus vive des taches roses des memos ailes en dessous et principalement par la 
forme de ses queues qui sout plus droites, plus allongees, a peine spatulees et non marquees 
de rouge, comme dans ravana." (Oberthiir, I. c.) 
The figure of chentsong, Oberthiir, only appears to differ from that of 
nevilli, Wood-Mason and de Niceville, in the smaller size of the two pale 
blotches on the costal portion of the outer area of the secondaries. 
I have received a very large number of specimens of this species from 
Western China, where it was found in most of the localities visited by my 
collectors. As in the allied species, the submarginal spots of secondaries are 
liable to considerable variation, not only in size and shape, but also in number 
aud coloration. In some specimens the upper spots, which are usually white, 
are well marked with red, whilst in other specimens the only spots present 
are the three upper ones, which are greatly reduced in size and are pure 
white in colour. In most of my specimens the red spot towards anal angle is 
absent or only slightly indicated, none of them exhibit any trace of a red 
spot towards extremity of the tail which seems to be always present in 
P. ravana, Moore, of which, however, it cannot be considered a local race, as 
M. Oberthiir suggests it may be. 
JJisfrilmtion. Cachar and Western China. 
