THE BUTTERFLIES OF CEYLON 85 
distinct on the upper side, but typical specimens of 9 
pyranthe may be found with the under side coloured almost 
as in florella. The antenne of florella are said to be plum 
coloured, and those of pyvanthe dark-brown, but I have not 
found this test reliable. Personally I suspect it to be only 
a seasonal variety of pyranthe, but I hope to induce a @ to 
lay her eggs in captivity and so settle the point. Breeding 
experiments by Mr. O. S. Wickwar and the late Colonel 
Manders seem to prove that gnoma is a wet season form of 
pyranthe, but Iam not certain that gnoma=florella in this case. 
It is commonest at Haldummulla in November and 
December, viz., during the north-east monsoon flights. 
152. .TERIAS LIBYTHEA, B. Terzas drona, M.; Tenas 
(Kibreeta) libythea, E. Found alsoin India and Burma. 
This is a most variable insect in size, shape of the wings, 
and markings, and I consider that the variation is seasonal, 
the extremes being the cold and warm season forms res- 
pectively. They grade perfectly into one another. See 
Plate 3, figs. r and 2. 
In the cold season form the apex of the fore wing is acu- 
minate, the black marginal band on the fore wing is inter- 
rupted by a narrow yellow patch in interspace 1. The band 
on the lower wing is broken up into a broad apical patch 
reaching to interspace 5, followed by triangular spots at the 
ends of veins 2 to 5, continued a little way up each vein. 
There is usually a pink border to the under side of the costa 
of the fore wing, and the cilia are sometimes salmon-pink, as 
given by Bingham. In the warm season form the apex of the 
fore wing is more rounded, and the black marginal band on 
both wings is unbroken, being continuous from the apex of 
the fore wing to the tornus of the hind wing. The pink 
border to the under side of the costa is never present, and the 
cilia are pale yellow mixed with black. On the under side 
of the fore wing there is occasionally a distinct narrow pre- 
apical black streak running from the costa to vein 4. All the 
other markings are more obscure. 
The cold season form is rare, and is most likely to be taken 
at Haldummulla from January to March, acool, dry season 
