Pupal coloration in Papilio polytes. 419 
confirmed by Mr. Trimen, who has also recorded * a similar 
accommodation in the pupa of the widely spread P. 
demoleus, Linn.; the latter species also occurs in Ceylon, 
and, from the close resemblance of its larva to that 
of P. polytes, was often collected by mistake and reared 
to the imago stage. Unfortunately no definite experiments 
were made, but general observations seemed to suggest 
that in Ceylon it would behave in the same manner as 
polytes, 
As a whole it is obviously impossible to make any 
generalisations on the subject of pupal coloration in the 
Pamilios. The genus is evidently of considerable interest 
from this point of view, and it is to be hoped that those 
who have abundant material at hand will not neglect their 
opportunities of making experiments—especially as the 
apparatus required is neither large nor expensive, and the 
amount of time required comparatively small. 
* Phil. Trans., op. ct., p. 316. 
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