346 Professor E. B. Poulton on ecolowr-relation 
shades of brown. It was re-fed on April 16th, 21st (mark- 
ings of two shades of pale brown), and 23rd, and was 
always found on sticks with appearance unchanged. 
April 26th. Re-fed. On stick. The larva was now 
white with grey and brownish markings. On May 3rd it 
was re-fed, the appearance being unchanged. 
May 7th. The larva had changed skin; the white parts 
had become yellower. It was re-fed on "May Lith; T7th. 
and 22nd, and was noted as at rest on stick on the 11th 
and 22nd. It remained to the end of a yellowish-white 
with markings of grey and brown. 
May 25th. ”The larva was painted by Mr. Bayzand and 
is shown in Plate XVIII, fig. 3. It was sent to Lord 
Walsingham on the same date. 
G. Two light quercifolia larve on black twigs during and 
after hybernation. 
Apri Tth. Re-fed. Both lichen-hke. 
April 10th. Re-fed. Both at rest on twigs. One had 
changed skin, and the greyish markings had become rather 
darker. Both were at rest on twigs with appearance 
unchanged when they were re-fed on the 16th. 
April 21st. Re-fed. Both on twigs. One larva was 
white with pale grey markings, the other creamy-white 
with markings of a brownish-grey. Unchanged and on 
twigs when re-fed on the 23rd. 
April 26th. Re-fed. Both on twigs. The white colour 
of the larva first mentioned on the 21st had gained a faint 
bluish tinge. The other larva unchanged. 
May 5th. Re- fed, after having been brought back from 
London. The creamy-white larva had changed skin and 
was rather paler in tint. Both were on twigs and un- 
changed when re-fed on the 11th. The creamy-white 
larva was painted by Mr. Bayzand on the 14th, and is 
shown in Plate XVIII, fig. 1 
May 17th. Re-fed. Both on twigs. One larva large 
and pale creamy-white with greyish-brown markings. 
The other much smaller, white with bluish-grey markings, 
but with tints duller than they were formerly. It had not 
grown much, nor changed its skin. Both larva were un- 
change ed in appearnce, “and were resting on twigs when 
they were re-fed on the 22nd. The creamy larva was sent 
to Lord Walsmgham on May 25th. The smaller bluish- 
