Adjustment of colour in various pup^, etc. 423 



inasmuch as the species is already known to be susceptible. 

 In addition to those tabulated below, Mr. A. H. Hamm 

 found two very dark pupa?, evidently (1), on a tarred fence 

 near Oxford, on April 2, 1899. 



All the (5)s were bright green and very pronounced 



representations of this degree. A few other conditions 

 were tried, but the single pupae subjected to them had 

 died and the colour had changed so greatly that they 

 could not be tabulated. 



The numbers of the pupai are not large and the results 

 quite confirmatory of previous experiments. (Phil. Trans. 



