302 LTCiENID^. 
$ . Papilio idas, LinnseuSj Faun. Suec. p. 284 (1761). 
Lijceena argus, Lang, Butt. Eur. p. 105 (1884) ; Pryer, Rhop. Nilion. p. 18, pi. v. 
figs, la, 16, lc(1886). 
" Expands 1 to 1-10 inch. The male is dark blue, uearlj- the same colour as L. a;goii, which it 
altogether greatly resembles ; the hind marginal border, however, is narrower and more 
defined, the hind marginal spots of the hind wings are more distinct, and the white marginal 
fringes are very narrow — not broad, as in mfon. The female on the upper surface almost 
entirely resembles the female of L. cegon, but the orange hind marginal spots are rather 
more distinct. Underside : ground-colour uniform brownish grey in both sexes ; the central 
row of spots on the fore wings is more even, the last spot but one from the inner margin 
being more in a line with the rest, and not, as it were, thrust inwards, as in L. cec/on ; the 
silvery spots on the hind margin are much more distinct than in (fgon. The anterior tibise 
are not provided with spines." (^Lang, I. c.) 
Dr. Lang, quoting Guenee, says that the larva is dark green, with a red 
dorsal line and an oblique reddish streak bordered with whitish on each 
segment. Food-plants Genista, Melilotus, &c. 
The usual form of this species met with in Japan and Corea is brilliantly 
tinged with pui'ple. It occurs in the mountainous districts of Central Japan, 
and I have received specimens from the Island of Kiushiu. The form 
described below as var. insularis has so far only been found in Yesso, and 
appears to be the only representative of L. argus in that island. 
Tar. insularis, var. nov. (Plate XXXI. figs. 5 $ , 8 J ■) Male. Ground-colour pale silvery 
blue ; the neuration is whitish except on the marginal area, where it becomes blackish ; outer 
border of primaries broadly black. Secondaries have a well-defined series of submarginal 
spots followed by a narrow black marginal line. Fringes snow-white. 
Female. Black, much suffused with blue-grey about the disc of the primaries ; discoidal spot 
distant and bordered with white : there is a marginal line of almost confluent large black 
spots preceded by a brownish band. Secondaries have a series of elongate black spots, 
intersected by a series of brownish lunules and bordered externally with pure white. Fringes 
greyish tinged with brown. 
Under surface of both sexes as in the type, but paler ; the female being as pale as typical males 
and more suffused with blue at the base. The silver spots are in some cases absent. 
This form of L. argus is casUy distinguished from L. ihwiensis by the character of black marginal 
borders to all the wings, the different colour of the neuration, and on the under surface by the 
paler coloration, fulvous markings on the outer margin of primaries, and larger size of these 
markings on secondaries. 
Expanse 34-36 miUim. 
A long series of this interesting form was taken by my native collectors in 
the neighboui-hood of Hakodate in the Island of Yesso in June and July. 
Lyccena argus and L. cegon are both exceedingly variable insects, and it is 
