70 Mr. A. G. Butler on Papilio Cocytus. 
XI.—Remarks upon the Papilio Cocytus of Fabricius and its 
distinctness from the Adolias Cocytus of Authors. By A. G. 
Butter, F.Z.8. 
In the fifth volume of the ‘ Zoological Journal,’ pp. 67, 68 
(1835), Dr. Horsfield has noticed the distinctness of the Co- 
cyta of Fabricius’s ‘Entomologia Systematica’ from the Co- 
cytus of his ‘ Mantissa;’ he moreover figures a species, appa- 
rently identical with the former, under the more distinctive 
name of Cocytina®*. It is unfortunate that he should not have 
figured an Kast-Indian example, as the Sumatran form now 
proves to be a distinct species. . 
I find, by referring to the ‘Genera of Diurnal Lepidoptera,’ 
p- 291. no. 9 (1850), that Adolias Cocytus is stated to be in 
the collection of the British Museum from North Indiat,—a 
species which in some points agrees with the typical deserip- 
tion being mistaken for that insect. Mr. Moore, in his mono- 
graph of Adolias (‘Trans. Ent. Soc. vol. v. p. 76. n. 28: 1859), 
evidently intends the same species, which he quotes as from 
North and South India. ned 
On referring to the type of P. Cocytus in the Banksian col- 
lection, I find that it is totally distinct from the above-men- 
tioned species. It is a good deal faded; but the pale band of 
the hind wings still shows a bluish tinge towards the apex, and 
in the right-hand wing, which lies behind the fore wing, and has 
consequently had more protection, there is a distinct flush of 
bluish violet, indicating that the original colour of the band 
was blue, and not ash-coloured as stated by Fabricius. ‘The 
underside of the wings is entirely ochreous, with a submarginal 
lunulate interrupted band, very indistinct in the hind wings 
(“‘ striga postica fusca,” Fabr.), the apex of the fore wings also 
being tipped with dark fuscous; the fore-wing cell has the usual 
lituree ; but in the hind wings they are scarcely indicated. 
Fabricius describes the underside of the wings as “ omnes 
cinerascentes ;’’ but there is now no indication of such colora- 
tion in the type; and I think, considering the careless manner 
in which many of the Fabrician descriptions were put together, 
that it is exceedingly likely that this is an error. © 
We have a specimen of a species from Assam, and a second 
without a locality, which only differ from the type in having 
the apex of the fore wing slightly less falcate, the blue mar- 
ginal band rather narrower, and the underside of the fore wing 
with a violet nebulous streak along its outer margin: there 
* Vollenhoven has figured a species near Cocytina from Java (Tijd- 
schrift voor Entomologie, vol. y. pl. 12. figs. 8,4) under the name of 
Blume. 
+ The original locality (Siam) is also quoted. 
