tJie colours of certain Lepidoptcra. 



419 



Transferotce and comparison Experiments to aricertain 

 tlie susceptibility of the preparatory stages. Experi- 

 ments 94—100. 1891. 



A few larvae, probably the last of a company, were 

 found at Oxford, July 26, 1891. Being full-fed the expe- 

 riments were arranged the same evening, about 8 p.n*. 

 They were divided into 2 lots, one of which was placed 

 in gold, green, or white surroundings, in light ; the 

 other in gold surroundings in complete darkness, except 

 when examined. 



By the morning of July 28 (10,15), 11 larvae were 

 suspended among those exposed to light, and, as all 

 appeared to be equally mature, it may be assumed that 

 the remaining 9 were very near suspension, viz., the 

 beginning of Stage III. They were, therefore, trans- 

 ferred to darkness for this stage and the remaining part 

 of Stage II. At the same hour 8 of the larvae in dark- 

 ness were suspended, and the remaining 8 were trans- 

 ferred to light for the rest of the period before pupation. 

 The following table represents the course and results of 

 the experiments. 



{See Table, pogei> 41C. 417.) 



The results of these experiments are best shown I>y 

 another method of tabulation. 



