LEPIDOPTEROUS PUPJS AND THEIR SURROUNDING SURFACES. 
345 
than the white, and this is further confirmed if the results of Division B. be taken 
into consideration. I also noted that when the pupae produced respectively by these 
two surroundings were equally brilliant, and were therefore placed in the same degree 
of colour, those which had been influenced by the gilt surface were of a much deeper, 
truer, gold-colour than the others, which were often silvery-white. I had abundant 
opportunity of confirming this observation on subsequent occasions. The total number 
of pupae obtained from this division was 31. 
VI.-—Another series of larvae were also obtained from the same large nettle-bed 
near South Hincksey, August 22, but they were on a different part of the bed from 
those of the last series, and were also much less advanced. They probably constituted 
the whole of a very small company. 
After the negative results of the experiments upon the bristles T determined to 
renew the blinding experiments, making use of all the precautions which had been 
observed in the last series. 
A. In this experiment the two “opal ’’-covered cylinders, already frequently alluded 
to, were made use of. The history of the experiment is given below in a tabular 
form :— 
2 Y 
MDCCCLXXX VII. —B. 
