Adjustment of colour in various ]pu])x, etc. 385 



1 pupa was discoloured, but bad probably been inter- 

 mediate between a light and dark grey (2 «, I). 



6 



The form with white ground perhaps indicates some 

 special influence of the surroundings in the direction of 

 producing a peculiarly close resemblance ; but more 

 experiments are needed in order to render it certain that 

 the case was not that of a rare individual peculiarity. 



{b) In fair light. 

 1 pupa was intermediate between light and dark 



yellow-green (1 «, 6). 

 1 pupa was light yellow-green (1 a), with a tendency 



towards bone-colour in the ground (2). 



2 



"" (c) In dark corner. 



The single pupa was discoloured, but was probably 

 light yeUo%v-green (1 a), with some tendency towards 

 grey (2). 



(18) YELLOW PAPER. («) In strong light. 



1 pupa was dark yellow-green (1 V). 



3 pupae were yelloiv-green (1), discoloured, but pro- 

 bably light (1 a), or intermediate between light 

 and dark (1 a, b). 



2 pupae were light yellow-green (1 a), with some 



tendency towards gi'ey. 



6 



*" (b) Through glass. 



The single pupa was dead, and had entirely blackened. 



(c) On glass. 

 The single pupa was discoloured, but was probably 

 yellotv-green, and certainly had not been highly pigmented. 



(14) YELLOW-ORANGE LENO. 



This label could not be found as distinct from the yellow 

 (13) and ora7ige (14) ; or I may have overlooked it. 

 The results are certainly included in one or more of the 

 sub-divisions of (13) or (14), inasmuch as the total number 

 of the pupae examined is 72,— the number given by Mr. 

 Merrifield. 



TRANS. ENT. SOC. LOND. 1899.— PART IV. (DEC.) 26 



