MR. NEWPORT ON THE TEMPERATURE OF INSECTS. 
275 
vations was perfectly calm. Thrice during this period of repose the insect became 
slightly aroused, and each time, as shown oil the Table, the number of its pulsations 
and its temperature slightly increased, but subsided again as the insect relapsed into 
its previous condition. Once also it was disturbed by the passing of excrement, im- 
mediately after which there was a slight increase of its temperature, and of the pul- 
sation of its dorsal vessel, and the insect continued awake for a few minutes, but 
having relapsed into its former sleep its temperature and pulsation again subsided. 
Table II. 
Exhibiting the diminished temperature of body during sleep, and also a coincident 
diminution in the rate of pulsation of the dorsal vessel in different conditions of the 
insect during the last three days of the larva state of the Sphinx Ligustri, Linn. 
No. 
Species. 
Period of Observation. 
Atmo- 
sphere. 
Insect. 
Differ- 
ence. 
Pulsa- 
tion. 
1834. , „ 
o 
o 
o 
1 
Sphinx ligustri, larva... 
Aug. 29. a.m. 11 15 
66-8 
67-3 
•5 
27 
2 
Sphinx ligustri, larva... 
A.M. 11 30 
67-6 
6S-0 
•4 
27 
3 
Sphinx ligustri, larva... 
A. M. 11 40 
67-8 
68-1 
•3 
28 
4 
Sphinx ligustri, larva... 
A.M. 11 45 
68-0 
68-2 
•2 
29 
5 
Sphinx ligustri, larva... 
A.M. 11 50 
68-4 
68-6 
•2 
30 
6 
Sphinx ligustri, larva... 
A.M. 12 0 
68-5 
68-6 
•1 
30 
•7 
Sphinx ligustri, larva... 
A.M. 12 8 
68-8 
68-9 
'I 
31 
8 
Sphinx ligustri, larva... 
A.M. 12 15 
69-1 
69-1 
•0 
32 
9 
Sphinx ligustri, larva... 
a.m. 12 23 
69-2 
69-2 
•0 
31 
10 
Sphinx ligustri, larva... 
a.m. 12 30 
69-3 
69-4 
•1 
33 
11 
Sphinx ligustri, larva... 
p.m. 12 38 
69-5 
69-5 
•0 
31 
12 
Sphinx ligustri, larva... 
p.m. 12 45 
69-6 
69-6 
•0 
32 
13 
Sphinx ligustri, larva... 
p.m. 12 50 
69-7 
69-7 
•0 
32 
14 
Sphinx ligustri, larva... 
P. M. 1 0 
69-7 
69-7 
•0 
32 
15 
Sphinx ligustri, larva... 
P. M. 1 8 
69-8 
69-8 
•0 
32 
16 
Sphinx ligustri, larva... 
P.M. 1 15 
69-9 
69-9 
•0 
32 
17 
Sphinx ligustri, larva... 
p.m. 2 0 
69-7 
69-8 
■1 
31 
18 
Sphinx ligustri, larva... 
p.m. 2 45 
69-6 
69-7 
•1 
31 
19 
Sphinx ligustri, larva... 
p. m. 3 15 
69-2 
69-6 
•4 
30 
20 
Sphinx ligustri, larva... 
p.m. 3 30 
69-3 
69-8 
•3 
30 
21 
Sphinx ligustri, larva... 
p. m. 4 0 
69-3 
69-8 
•5 
30 
22 
Sphinx ligustri, larva... 
p.m. 4 15 
69-4 
89-9 
•5 
30 
23 
Sphinx ligustri, larva... 
p.m. 5 0 
69-4 
69-8 
•4 
29 
24 
Sphinx ligustri, larva... 
p.m. 5 15 
69-4 
69-9 
•5 
31 
25 
Sphinx ligustri, larva... 
p.m. 5 30 
69-4 
69-9 
•5 
30 
26 
Sphinx ligustri, larva... 
p.m. 6 0 
69-1 
69-7 
•6 
29 
27 
Sphinx ligustri, larva... 
p. m. 6 30 
68-8 
69-3 
•5 
29 
28 
Sphinx ligustri, larva... 
P.M. 7 0 
68-7 
69-6 
•9 
36 
29 
Sphinx ligustri, larva... 
Aug. 30. a.m. 6 0 
65-0 
65-4 
•4 
25 
30 
Sphinx ligustri, larva... 
A.M. 7 0 
65-5 
65-8 
•3 
25 
31 
Sphinx ligustri, larva .. 
A.M. 8 0 
66-0 
66-3 
•3 
24 
32 
Sphinx ligustri, larva... 
A.M. 9 0 
67-4 
26 
33 
Sphinx ligustri, larva... 
Aug. 31. A.M. 11 0 
66-6 
67-0 
•4 
18 
34 
Sphinx ligustri, pupa... 
Sept. 4. a.m. 10 0 
66-1 
66-4 
•3 
12 
Faces. 
Loss. 
Age. 
Remarks. 
grs. 
grs. 
ges. 
7th day. 
61 
141-4 
136-6 
110-4 
79-4 
3-5 
Skin. 
3-8 
27-2 
8th day. 
9th day. 
13th day. 
f After last change of skin, 
{ sleeping. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleepi ng,but slightly aroused. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleeping. 
Sleeping, 
f Arousing, changing co- 
\ lour for transformation. 
Sleeping. 
Sleeping. 
Sleeping. 
Aroused and active. 
Sleeping. 
Sleeping. 
Sleeping, much discoloured. 
Aroused, very active, 
f Just entered the earth, 
\ very active. 
f Pupa within one hour 
< after changing, has been 
[_ much disturbed. 
4. Hybernation. 
From a state of profound sleep we pass to that of hybernation, which, as shown in 
the hybernating Mammalia*, appears to be almost identical with the natural repose 
of all animals. In insects, however, hybernation seems to differ from natural rest in 
some of its exciting causes. Thus there are reasons for believing that this disposi- 
tion to pass into a profound sleep, bears some relation to the changes which take 
* Dr. M. Hall, Philosophical Transactions, 1832, Part I. 
MDCCCXXXVII. 2 O 
