82 THE BUTTERFLIES OF CEYLON 
appears in open country, and I have noticed it once in the 
Fort at Galle, and it is common in the town of Jaffna. 
I have two specimens from Mannar (January—wet season). 
They are very small, but have an exceptional amount of 
black, the post-discal spot being joined by a black line to the 
black on the terminal margin ; one of these specimens also 
shows a very fine black marginal line on the lower wing. With 
these exceptions, I have noticed very little variation. 
It is the slowest flying butterfly I know, and is nearly 
always found fluttering low on the edge of the jungle, so is 
very easy to catch. It flies all the year round. 
146. DELIAS EUCHARIS. Found also in India and Burma, 
It is abundant everywhere, at all elevations, and flies all the 
year round. 
- The larva feeds on Loranthus, but wanders some distance 
to pupate, as the pupa, which is very conspicuous, may be 
found anywhere, on bungalow walls, rocks, etc 
It usually flies rather high, but comes readily to flowers, 
especially Durania. It is not given to settling on wet roads, 
like the next species (P. stia). 
The female varies greatly in the width of the black 
markings, and I have also taken two or three specimens of a 
variety in which the white of the upper surface is replaced by 
yellow. I have found this form rare, but a native collector 
assures me that he has frequently seen it in the Ratnapura 
District, so it is apparently a wet season form. 
147. PRIONERIS sITA. Also found in Southern India. 
A well-known mimic of the last (D. eucharis). The male 
can be distinguished by their stronger flight, their much more 
pointed fore wings, and the absence of the post-discal band on 
the upper side of the fore wing. The real mimicry is, as I 
believe is always the case among Ceylon butterflies, shown 
by the female. She has a much slower flight than the male, 
the fore wing is not so pointed, and the post-discal band is 
almost as well marked as in eucharis, the resemblance being 
even greater on the wing than in the cabinet. On the under 
side the mimicry is not quite so perfect ; the marginal spots 
on the hind wing being vermilion instead of carmine, and 
