400 



Mr. F. Merrifield and Mr. E. B. Poulton on 



Experiments. 



Degrees of Pupal Colour. 



Light (3) 



Compact gi'oup in , 

 the outer side of 

 the middle part of 

 roof (viz. away 

 from the black). , 



Group in the 

 inner side of the 

 middle part of roof 

 (towards the black). 



Elongated group 

 along outer side of 

 posterior part of 

 roof. 



Inner side of 

 posterior part of 

 roof. 



yellowish-green, and really 

 transitional to (3 a). It 

 and five others almost pig- 

 mentless, six with very 

 little pigment, and one 

 with much, like a dark 

 (3 a) and yet hardly a trace 

 of wing-mark. Twelve of 

 the (3 h) distinct green 

 ground. 



Heads of all pupae directly 

 point to light. The (3 a) 

 very pale, but more pig- 

 mented than any green 

 (3 b) in this group and 

 with traces of wing- 

 mark. (3 b) all distinct 

 green and very little pig- 

 ment. 



Another pupa dead. All 

 heads pointed directly to 

 light. (3 a) with very 

 little pigment. Seven 

 (3 b) similar, and one 

 darker, but no trace of 

 wing-mark. All (3 b) dis- 

 tinct green. 



13 All directly faced light 

 I except one parallel with 

 front and two reversed 

 : (tails directly pointing to 

 j light). All distinct green, 

 j and, except three, with 

 very little pigment. 



1 Distinct green, very little 

 pigment. Directly faced 

 I liglit. 



36. Orange, 

 glass. 



through 



3 I Another pupa dead. One 

 ' pale, two deep green ; all 

 very pigmentless. 



