hehvccn leindoptcrous larvm and their surroundings. 337 



lY. G. qttercifolia. 



The larvae with green leaves and shoots were very 

 varied, showing tendencies in the direction of all the other 

 groups, but chiefly resembling the chequered black-and- 

 white larvEe with the black twigs of Turkish oak, although 

 the ground-colour was not nearly so dark. A few tended 

 toAvards the greater development of the light markings 

 which was characteristic of the group with the lichen- 

 covered sticks, while all of them approached the larva? 

 with the brown stems in the dusky tint of the dark ground- 

 colour. There was no reason for painting any of these 

 larvae. 



Arrangements for Hybernation and final 



Comparison of the quercifolia larvje 



before Hybernation. 



I. G. qncrcAfolia. 



October Srd. Larvae with black twigs. It was evident 

 that the larvae were ready to hybernate. They had eaten 

 very little, and some of them were spinning a foot-hold. 

 The size was that shown on Plate XVII, figs. 1 to 3. A 

 great change had taken place since the last comparison on 

 September 21st : only 3 larva- instead of 9 were now 

 chequered black-and-white, G having become nearly as dark 

 as 5 out of the 6 darkest members of the group. The 

 white patches of the chequered individual painted on 

 September 25th were now far duller and less conspicuovis. 

 The larvae of this and all the other series were specially 

 arranged so as to test for the existence of any susceptibility 

 to the colours of the environment during hybernation. All 

 were enclosed in muslin sleeves upon a large hawthorn 

 tree, with pink double flowers, in the garden of Wykeham 

 House, Oxford. It should be noted that the branches 

 enclosed in the sleeves were very dark, although not so 

 intense a black as the twigs of the Turkish oak. 



A. The 3 chequered black-and-white larvae were enclosed 

 with an abundance of black twigs of Turkish oak. 



B. The 5 darkest were similarly placed with lichen- 

 covered twigs. 



C. Six dark larvfe, but not quite so dark as the last lot, 

 "were similarly enclosed with black twigs. 



