34G MR. E. B. POULTON OX THE COLOUR-RELATION BETWEEN EXPOSED 
Dates, &c. 
(a) 12 normal larvae in opal-covered cylinder 
with white-paper floor. 
( p ) 12 blinded larvae in a similar cylinder. 
Aug. 25, 10.30 p.m. 
Larvae placed in cylinder. 
Larvae blinded and placed in cylinder. 
Aug. 26, 9.35 a.m. 
3 suspended; the remaining 9 reblinded; 
only 2 on food-plant; rest preparing 
for suspension. 
„ 12.10 p.m. 
Only 2 on food-plant; rest getting ready 
for suspension 
No change. 
„ 12.40 p.m. 
1 of those on food-plant is really sus¬ 
pended from it; not noticed previously 
4 suspended; only 1 on food-plant. 
(1 about 12.25 p.m.) 
,, 3.30 p.m. 
2 suspended altogether; hut all others 
ready. (1 about 2 p.m.) 
7 suspended; only 1 on food-plant. 
(3 about 2 p.m.) 
„ 5.30 p.m. 
2 suspended altogether; but all others 
ready. (1 about 2 p.m.) 
7 suspended; only 1 on food plant. 
(3 about 2 p.m.) 
„ 7.50 p.m. 
6 suspended altogether; but all others 
ready. (4 about 6.40 p.m.) 
9 suspended; only 1 on food-plant. 
(2 about 6.40 p.m.) 
„ 9.10 p.m. 
10 suspended altogether; but all others 
ready. (4 about 8.30 P.M.) 
10 suspended; only 1 on food-plant. 
(1 about 8.30 p.m.) 
„ 10.45 p.m. 
1 pupated, amoug a group on the side, 
quite recently; green and still very 
soft; 9 suspended, 1 ready for pupa¬ 
tion on floor, and 1 still feeding. 
„ 10.55 p.m. 
11 suspended (1 about 10.50 p.m.) 
,, 11.25 p.m. 
No change. 
No change. 
Aug. 27, 9.40 a.m. 
2 pupated an hour or two; all suspended. 
(Hence Stage III. about 19 hours; this 
must be nearly correct for 1 of the 
pupse) 
8 have pupated; 1 very recently (Stage 
III. about 15 hours) and 2 an hour or 
two (Stage III. about 18 hours) ; the 
others many hours ; among latter is 
the one lying on the floor; the last 
larva to feed is now ascending side. 
,, 12 NOON 
5 pupated altogether. (3 about 11 a.m., 
and Stage III. about 16 hours) 
9 have pupated (about 11 a.m., Stage 
III., 16^ hours about) ; the last larva 
still wandering. 
„ 1.15 P.M. 
10 pupated altogether (5 about 12.37 p.m., 
and Stage III. about 16 hours, in the 
case of 4 pupae, and not very different 
with the 5th) 
The last larva has gone up to roof. 
(12.37 p.m. about; Stage I. at least 
3 hours.) 
„ 2.12 p.m. 
10 pupated altogether. 
10 have pupated altogether. (1.45 p.m. 
about; Stage III. about 17j hours.) 
„ 4.7 p.m. 
11 pupated altogether. (1 pupated 
about 3.10 p.m., and Stage III. about 
16 hours 20 minutes) 
11 have pupated altogether. 
„ 9.30 p.m. 
All 12 have now pupated. 
The last larva is suspended. (About 
6.45 p.m. ; Stage II. about 6 hours.) 
,, 10.58 p.m. 
The last larva is suspended. 
Aug. 28, 10 a.m. 
The last larva has now pupated quite 
recently. (Thus Stage III. about 15 
hours, and the whole period only 
about 24 hours since 9.40 a.m., but 
Stage I. may have begun much earlier.) 
Aug. 29. 
8 on roof, much crowded, and of these 
6 very crowded on side (clear glass) 
Comparison of 
1 pupa was (2), darkish. 
towards light: these were 
results 
2 pupae were dark (3) 
3 „ „ (3) 
2 „ light (3) 
2 also on roof, close together, but a long 
distance from rest, were both 
light (3) 
1 on side (clear glass) and isolated, 
very dark (3) 
1 on floor attached to food, but not in 
shadow at all, was (4), normal, 
12 'with large amount of gold. 
2 very dark (3), almost (2). 
4 . . . (3), 1 of them rather 
lightish, but not a light (3). 
1 on side, isolated, towards light, (4), 
very pink, with rather small 
amount of gold. 
1 on floor, isolated, very light (3). 
4 on roof, and isolated, were 
1 (3), 
12 2 (4), golden. 
1 (5), normal. 
