348 Professor E. B. Poulton on colowr-relation 
larva unchanged. The other had now also darkened, 
becoming blackish-grey with paler marks. The larve 
were re-fed on May 17th, 21st, and 25th, without further 
change in appearance. It was noted that they were at rest 
on the sticks on the 17th and 21st. On May 31st both 
larvze were sent to Lord Walsingham. 
I. The two larger darker quercifolia larve separated from 
I on April 16th. 
April 16th. One larva was now blackish-brown with 
white marks, the other very dark grey with white and 
brown marks. 
April 21st. Re-fed. One larva on sticks, 1 on twigs 
of hawthorn. Appearance unchanged, as also on April 
23rd and 26th, when they were re-fed and both found on 
sticks, 
May 1st. The dark grey larva had changed skin and 
become blackish-brown with pale and brown spots. On 
May 3rd they were re-fed and found unchanged in appear- 
ance on the sticks. 
May (1th. The larva with pale and brown spots was 
sent to Lord Walsingham. The remaining larva was at 
rest on stick, and blackish with two pale marks. It was 
re-fed on May 17th (on stick) and 25th. On the 31st it 
was sent to Lord Walsingham. There was no further 
change in its appearance. 
J. Two uniform quercifolia larve on black twigs during 
and after hybernation. 
April Tth. Re-fed. One larva purplish-brown and black, 
the other had changed skin and was black with small 
white patches and minute brown points. Both were resting 
on twigs and unchanged in appearance when re-fed on 
the 10th. 
April 16th. Re-fed. Both on twigs. The purplish-brown 
and black larva appeared to be even darker, the other 
unchanged. Both were on twigs and unaltered when 
re-fed on 21st and 25rd. 
April 26th. The black larva with small white patches 
and minute brown points was dying. 
April 27th. The last-mentioned larva was dead. The 
other purplish-black larva was at rest on a twig. 
May 1st. The larva had changed skin, and was black with 
