334 Professor E. B. Poulton on colowr-relation 
The 12 larvae were re-fed on September 26th and 30th, 
and on October 8rd and 7th. 
IIL. G. querctfolia. 
July 28th, 1893. Fifteen of the quercifolia placed with 
red-brown stems of the bramble, intermixed with their 
food-plant, hawthorn. They were re-fed and examined 
on the following dates. 
August 1st. Only 1 resting on bramble stem, others on 
leaf-stalks. Blackish-grey in colour. 
August 5th. Seven on stems, 5 on green parts of food- 
plant, 3 on gauze top of cylinder. 
August 9th. Thirteen on stems, 1 on green parts of 
food-plant, 1 missing. 
August 14th. Fourteen on stems. Some black with 
white markings, some grey and some mottled reddish- 
brown. 
August 19th. Fourteen on stems. 
August 22nd. One missing, all on stems. 
August 26th. Thirteen counted. 
August 31st. Thirteen on stems. All were now grey- 
brown with black and white markings. 
September 4th. Thirteen on stems. 
September 7th. Thirteen on stems. 
September 9th. Thirteen on stems. 
September 14th. The colours were now as follows :— 
1 brown and grey with white markings, 2 brown with white 
markings, 3 brown with various shades of grey, 3 grey and 
brown Seilh white an aes 2 grey with white markings 
and brown patches, 2 2 dark grey with white markings. 
September 16th. Thirteen counted. 
September 18th. Thirteen on stems. 
September 21st. Twelve on stems; 1 on hawthorn 
twig. 
They were also re-fed on September 26th, 30th, October 
3rd and 7th. 
IV. G. quercifolia. 
July 28th, 1893. Fifteen larvae of quercifolia placed 
with green leaves and shoots of the hawthorn. They were 
re-fed and examined on the following dates. 
August 4th. Fifteen counted. Blackish-grey in colour. 
August 8th. Fifteen counted. 
