104 THE BUTTERFLIES OF CEYLON 
It answers to Bingham’s description of the dry season form of 
avistolochig. It was caught in July (dry season). 
It is very common at Ha!dummulla all the year round, and 
is well distributed all over the Island from Galle to Jaffna, 
though it is less common in the north than in the south. Its 
flight is slow, and it settles frequently at flowers, so it is easy 
to catch. I have never noticed it “‘ flighting.”’ 
I have seen a full-sized specimen killed and carried off for a 
short distance by an Asilid fly. 
178. PAPILIO DEMOLEUS, B. and E. Orpheides ertthontus, 
M. Found also in Arabia, Persia, India, Burma, China, etc. 
Tt is common all over the low-country, from Galle to 
Jaffna, and occasionally joins the flights in great numbers, 
and may then be taken at the highest elevations. 
The colour seems to be much affected by the sun or age, as 
specimens of a rusty orange are very plentiful all over the 
low-country, though I have never seen one over 3,000 feet 
elevation. These specimens will almost invariably be found 
to be much worn. ~An extraordinary aberration captured by 
myself on the Wellawaya-Hambantota road is figured and 
described in ‘‘ Spolia Zeylanica,’’ Vol. IX., Part XXXIII. 
The larve may be found on orange and lime trees, and 
are very like those of romulus, parinda, and mooreanus, 
which are found on the same trees. According to [ryer 
(‘‘ Spolia Zeylanica,’’ Vol. VII., Part XXVIII.), they may 
be distinguished as follows :— 
A —Fourth and fifth segments markedlv swollen: 
at .—Diagonal bands on segments 8 and 10 mainly brown, 
and meeting in the dorsal middle line = mooreanus. 
61.—Diagonal bands mainly white, not meeting in middle 
line = parinda. 
B.—Fourth and fifth segments not markedly swollen: 
az.—Caudal tubercles white, much reduced =: romulus. 
b2 --Caudal tubercles brown, size moderate = demoleus. 
179. PAPILIO (CHARUS) MOOREANUS. 
Papilio (Charus) helenus mooreanus, B., E.; Charus helenus, 
M. Peculiar to Ceylon. It is very constant and seems to 
deserve specific rank. 
