bdvjccn Iqndo'ptcTous larVcV and their s^irroundings. 333 



Sq')tcml3cr 14t7i. Fifteen larvre on black twigs, 2 



blackish, 13 black with white markings. 



September 16th. Fifteen larvjB on black twigs. 



Septemher IHth. Fifteen counted. 



Septcmhcr IXst. Fourteen larvae on twigs, and 1 little 



one on leaf. The larvae were re-fed on September 26th 

 and 30th. 



II. G. qnercifolia. 



July 28th, 1803. Fifteen larvae of qucrcifolia placed with 

 sticks profusely covered with lichen (probably Ramalina 

 farinacea was employed thoughout) intermixed with their 

 food-plant, hawthorn. They were re-fed and examined on 

 the following dates. 



August \st. One larva on lichen-covered stick ; all the 

 others on leaves and leaf-stalks. All blackish-grey in colour. 



August 5th. Twelve larva? on lichen-covered sticks ; 3 

 on food-plant. 



August dth. Fourteen larva? on lichen-covered sticks ; 

 1 on food -plant. 



August 14^A. Fourteen larva? on lichen-covered sticks. 

 Colours black with white and grey markings ; the latter 

 larger than on the larvae of the other experiments, 



August 19th. Thirteen larvop on sticks ; 1 on food- 

 plant. 



August 22nd. Thiiteon larva; on sticks. 



August 2Qth. Thirteen larva; on sticks. 



August ^Ist. Thirteen larva? on sticks. The white 

 and grey markings had now developed to a much greater 

 extent. 



September ^th. Thirteen larva? on sticks. 



Septemher Oth. Thirteen larvae on sticks. 



September 14th. Twelve larva? on sticks Colours 

 white and grey and black, except in the case of 2 larvae 

 without any black. 



September l%th. Twelve larva? counted. 



September 18th. Twelve larvae on sticks. 



September 21st. Nine larvae on sticks ; 3 on the twigs 

 of hawthorn. At this time of the year it was almost 

 impossible to get a sufficient quantity of the green shoots 

 of the hawthorn, so that darker twigs were sometimes 

 included, and upon these the larvas occasionally rested. 

 The larvae never rested upon the lichen itself, but on the 

 surface of the ba.rk between the masses. 



