336 MR. E. B. POULTON ON THE COLOUR-RELATION BETWEEN EXPOSED 
Aug. 22. 10.30 p.m. . . 
4 shorn larvae placed in compartment. 
„ 23. Morning . . . 
Very little food eaten, and larvae crawling 
up sides and on roof. 
Stage I. of preparatory 
periods. 
„ „ Early afternoon 
Larvae are crawling up sides and sitting 
on roof. 
Stages I. and II. of prepara¬ 
tory periods. 
„ „ 6 P.M. 
2 suspended, and apparently another 
nearly ready. 
Stages 11. and 111. of pre¬ 
paratory periods. 
,, „ 9.30 p.m. . . . 
2 more suspended. 
„ 24. 2.43 p.m. . . . 
3 have pupated some little time : an hour 
or two. If the 3 larvae ceased feeding 
about the time when they were placed 
in the compartment, it would make the 
whole preparatory period about 38-39 
hours. 
,, „ 2.47-2.53 p.m. . 
The last was seen to pupate at this time. 
The two larvae which were last to enter 
Stage III. may be assumed to have 
become suspended about 7.45 p.m., 
Aug. 23, and hence Stage III. lasted 
19 hours in one case and 17-18 hours 
in the other. 
Of the pupae, two were in a corner of the roof, only 5 mm. apart, the third being 
2'7 centimetres away from the one of the first-mentioned pupae which was nearest to 
it, while the fourth was similarly 2‘4 centimetres removed in another direction. Thus 
all four pupae were suspended from the roof. Their colours were compared August 26, 
4.15 p.m. :— 
Of the 4 pupae 1 was a very light (3) coming near a (4). 
2 were .... (4), very brilliantly golden. 
1 was.(5) „ 
4 
(f3) Five similar normal larvae were at the same time placed in the other compart¬ 
ment of the gilt box. One was removed on the 24th (see the B. division), while still 
feeding ; so that it is not necessary to describe it below. Their history is as follows :— 
Aug. 22. 10.30 p.m. . . 
5 normal larvae placed in compartment. 
,, 23. Morning and 
The larvae have been upon the roof most 
Stages 1 . and 11 . of the pre- 
afternoou. 
of the day, except one, which was 
removed on the 24th. 
paratory period. 
„ „ 9.30 p.m. . . . 
1 is suspended. 
Stage III. of the preparatory 
„ 24. 2 a.m. 
Same. 
period. 
„ „ 8.35 a.m. . . . 
3 suspended; but 1 has come down from 
the roof, and is wandering about 
actively. 
„ „ 2.43 p.m. . . . 
1 has just pupated, and quite fresh. As¬ 
suming the larva to have ceased feeding 
about the time when it was placed in 
the box, the preparatory period would 
be about 40 hours, and if suspension 
took place about 7.45 p.m., Aug. 23 (as 
is most probable), Stage III. would 
have lasted 19 hours. 
,, „ 11.45 p.m. . . 
2 more pupated, 1 recently, the other in 
the last few hours. If suspension began 
about 5.15 a.m., Aug. 24, the length of 
Stage III. would be about 181 hours in 
one case and a few hours less in the other. 
„ 25. 8.40 a.m . . . 
The last has pupated some hours. 
