between lepidopterous larvae and their surroundings. 347 
grey larva was painted on May 28th, and is shown in Plate 
XVIII, fig. 2. It was sent to Lord Walsingham on 
May 31st. 
H. The brownish quercifolia larva and the larva with bluish- 
white marks on lichen-covered sticks throughout. 
April Tth. Re-fed. One larva dead; the other grey 
and white. The larva was re-fed on the 10th, 16th, 20th, 
23rd, 26th, and on May 3rd. Its appearance remained 
unchanged. On all these dates except the last it was 
noted that the larva was at rest on the sticks. On May 
5th it was dead. 
III. THE QUERCIFOLIA LARVA ON BROWN BRAMBLE- 
STEMS BEFORE HYBERNATION. 
I. Four uniform quercifolia larve on lichen-covered sticks 
during and after hybernation, 
April Tih. Re-fed. All 4 dark brown, 2 rather darker 
than the others. 
April 10th. Re-fed. All 4 at rest on sticks: 2 un- 
changed, and 2 had changed skin, becoming respectively 
dark grey with white patches and blackish-grey with white 
patches and brown marks. 
April 14th. Re-fed. Larve on sticks. The larger ones 
unchanged. The 2 smaller had now changed skin, be- 
coming respectively very dark blackish-brown with white 
marks, and dark brown mottled with pale grey. 
April 16th. Re-fed. Larvee on sticks. The 2 larger 
darker larvae were now placed in another cylinder. The 
two remaining were respectively—mingled shades of dark 
and light grey with brown patches, and a uniform grey 
with large white patches. These 2 larvae were re-fed on 
April 21st and 23rd without change. They were always 
at rest on the sticks. 
April 26th. Re-fed. Both larve on sticks. One larva 
retained same appearance, grey with brown patches; the 
other was of a pale brownish-grey with paler marks. 
May Ast. The latter larva had become of a much darker 
brownish-grey with brown and pale marks. On May 3rd 
they were re-fed, and both were, on sticks: appearance 
unchanged. 
May 11th. Both larve on sticks. The last described 
