CEYLON BUTTERFLIES. 129 
better I have grown the food plant in a flower pot in my garden, 
and, though I have seen a large number of eggs being laid, I 
have so far failed to find a single half-grown larva on the plant. 
‘It is very variable, but all the varieties grade. The one 
named chryseis by Moore is by far the rarest. 
153. CATOPSILIA FLORELLA, B. & E.; Catopsilia gnoma, 
M.—Found in Africa, Persia, Afghanistan, Siam, China, &c. 
C. florella differs mainly from pyranthe in the terminal 
border of the fore wing ; pyranthe has a continuous band, 
broad at the apex and narrowed posteriorly ; florella has a 
narrow macular band, as broad in interspace 2 as at the apex. 
The difference is only clearly shown in the females. 
The female is occasionally very plentiful in Ceylon, and is 
found in company with pyranthe from Galle to Jaffna. Iam 
uncertain if I can distinguish the male from pyranthe, as it 
seems to grade perfectly. The female is certainly very 
distinct on the upper side, but typical specimens of 2 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 pyranthe 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 Q to lay her eggs 
in captivity and so settle the point. Breeding experiments 
by Mr. O. 8S. Wickwar and the late Colonel Manders seem to 
prove that gnoma is a wet season form of pyranthe, but I am 
not sure that gnoma = florella in this case. 
It is commonest at Haldummulla in November and 
December, viz., during the north-east monsoon flights. 
“Found in the Minneriya—Polonnaruwa country” (F. M. 
Mackwood). 
154. TERIAS LIBYTHEA, B.; Terias drona, M.; Kibreeta 
libythea, K.—Found also in 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 respectively. 
They grade perfectly into one another. See PI. 2, figs. 1 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 
