LEPIDOPTEROUS PUPJE AND THEIR SURROUNDING SURFACES. 
377 
The results of the above Table are very similar to (a). In the larvae numbered 
1, 2, &c. (omitting 1, because the experiment failed in this case), the pupae in the 
tubes with gilt chambers below are a little lighter than those with the black ones 
below; while greater differences in the same direction are shown in the less trust¬ 
worthy results obtained from the six larvae which were covered by the tubes for part 
of Stage III. ; and, as in (a), the latter are on the whole darker than those which had 
been exposed to gilt surfaces for the whole stage, while the free pupae are about inter¬ 
mediate, and also seem to show some faint correspondence with the colour of the 
surrounding tubes. 
(y) Another small subdivision is tabulated below, and only consisted of two larvae 
placed in tubes during the whole of Stage III., and of six free larvae 
Dates, &c. 
l 
2 
6 larvae free in glass cylinder. 
Sept. 4, 12.25 p.m. 
Cr 
These were free to suspend themselves 
,, 4 P.M. . . 
. . 
Or 
among the black and gilt tubes. 
„ 5, 9.35 a.m. . . 
P 
P 
Results : Sept. 7 . . 
Black 
Gold 
2 pupae on side of cylinder and close 
below 
below 
together, and both (3). 
1 on roof close to tube, black outside, (3). 
Dark 
(4) 
1 on roof, about equidistant from gilt and 
is; 
Very pink, 
but hardly 
any gold 
black tube, (3). 
1 on roof near to black tube, dark (3). 
1 on roof, far off a black tube, light (3). 
6 
As far as the evidence goes, the tube with the gilt chamber below produced much 
the greater effect, but the comparison only depends upon two individuals. The free 
pupae cannot well be compared with those above, but they are distinctly darker than 
those in tubes in subdivisions (a) and (/ 3 ). The pupae are very uniform, and on the 
whole do not afford any clear evidence of colour correspondence with the tubes, but at 
least half of them cannot have been near enough to be influenced at all. 
3 c 
MDCCCLXXX VII.—B. 
