between lepidopterous larve and their surroundings. 343 
April 10th. Re-fed. Four larvee on sticks. Appear- 
ance unchanged. 
April 16th. Re-fed. Four on sticks, 1 on hawthorn. 
Only 1 larva was now entirely black, the remaining 4 had 
acquired large white patches. Two larva, including the 
first-mentioned, were removed to cylinder Bl. 
April 20th. Re-fed. All 3 on sticks, appearance un- 
changed and on sticks, as also when re-fed on the 23rd. 
April 27th. Re-fed. Two on sticks, 1 on hawthorn. 
It was noted that in one of the larve the white marks 
were less developed than in the others. 
May ist. Re-fed. The last-mentioned larva had 
changed skin and the white markings were reduced to a 
single anterior pair and were quite small. The 2 others 
remained as before, and no further change was seen when 
the 3 larve were re-fed on the 3rd, 11th, 17th, 21st, and 
25th. They were noted as at rest on the sticks on all these 
dates, except the first and last. The darkest larva was 
painted by Mr. Bayzand on May 19th, and is shown in 
Plate XVII, fig. 14. Of the two others, the one with the 
more intensely black ground-colour was painted by him 
on the 22nd, and is shown in fig. 15 of the same plate. 
Both these figured larvee were sent to Lord Walsingham 
on May 25th, and the third was sent on May 31st. 
B!. The two quercifolia larve separated yrom cylinder B on 
April 16th. 
April 16th. The larvee were respectively entirely black, 
and black with white patches. 
April 20th. Re-fed. Both on sticks, colour unchanged. 
Similar results were noted when re-fed on the 23rd and 
27th. 
May 1st. Both larvee had apparently changed skin. 
The darker one had gained a pair of small white marks 
anteriorly. On May 5th the larvee were brought back 
from London. No further change. 
May 11th. Re-fed. The black-and-white larva was 
sent to Lord Walsingham. The single dark larva, on stick ; 
appearance unchanged. Similar notes on the 17th, 22nd, 
and 25th, except that it rested on the hawthorn on the 
first-named date, and its position was not recorded on the 
last-named. The larva was sent to Lord Walsingham on 
May 31st. 
