382 Mr. F. Mernfieia and Mr. E. B. Poulton 071 



(c) In a dark corner. 



AH the pupae were fixed to the black paper. 

 1 pupa was very dark grey (2 V). 

 3 pupae (one dead) were grey, probably liglit (2 a). 



1 pupa was grey, probably intermediate between dark 



and liglit (2 a, IS). 



5 



•^ 



(2) DARK STICKS (ONE MUCH LIGHTER THAN THE REST). 



All the pupae were attached to the sticks. 



2 pupae were dark grey, (2 li) one very dark. 



1 pupa, on the lightest bark, was light grey (2 a). 



2 pupae (dead) were grey, probably liglit (2 a). 



1 pupa (dead) and much altered, was probably the 

 yellow-green form (1) described by Mr. Merrifield 

 on p. 381. 



6 



(3) DIRTY WHITE PAINT. 



1 pupa, fixed to the painted surface, was intermediate 

 between dark and light grey (2 a, li), but with 

 some tendency, in the possession of a greenish 

 tinge, towards the yellow-green form (1), 



1 pupa, fixed to the painted surface, was dead and 

 changed in colour, but it had probably been 

 yellow-green (1). 



(4) DARKNESS. 



2 pupae were intermediate between dark and light 



yellow-green (1 a, h). 

 1 pupa (dead) had altered in colour, but had been a 



light form of either (1) or (2). 

 1 pupa was probably light yellota-green (1 a), but had 



darkened, apparently preparatory to emergence. 

 1 pupa was intermediate between (1) and (2) and also 



intermediate between dark and light {a, h). 

 5 



The absence of strong pigmentation, and the tendency 

 towards yellow-green rather than grey, were the marked 

 results of darkness, so far as these 5 pupae are concerned. 



