MR. NEWPORT ON THE TEMPERATURE OF INSECTS. 
321 
the observations on the Sphinx ligustri, it will be seen by the Table XII. that the heat 
developed during fasting is much less than during' the period of taking food. 
Table XII. — A Table* exhibiting the quantity of food eaten, with the rate of increase 
of weight, and the gaseous and faecal expenditure, and their effect on the Tempe- 
rature of a Larva of Sphinx ligustri. 
No. of Exp. 
Period of Observation. 
Feeding. 
Fasting. 
o c/5 
d, | 
s-i <2 
O 
c 
Difference. 
Weight of I 
larva in 9 
grains. j 
Weight of 
food eaten 
in grains. 
Increase, j 
Gaseous ex- | 
penditure. 1 
Faecal ex- 
penditure. 
Remarks. 
1832. 
o 
o 
o 
grs. 
1 
Twelve hours 
79-8 
2 
One hour 
82T 
2-8 
2-3 
•5 
3 
A.M. 12 
One hour 
80-8 
•4 
•9 
4 
One hour 
83-6 
3-4 
2-8 
•6 
5 
81-6 
•8 
1-2 
6 
One hour 
83-9 
2-7 
2-3 
•4 
7 
P.M. 6 
One hour 
85-1 
4-5 
1-2 
2 
1-3 
8 
P.M. 7 
One hour 
85-6 
3-2 
•5 
2-7 
9 
P.M. 8 
One hour 
85 
1-5 
•6 
1-5 
10 
P.M. 9 
One hour 
86-5 
2-1 
1-5 
•6 
11 
Aug. 19 p.m. 9 to 20 a.m. 6 
Nine hours ... 
88 
16-5 
1-5 
7 
8 
12 
A.M. 7 
One hour 
87-6 
•4 
13 
A.M. 8 
*# 
** 
85-6 
•4 
1-6 
14 
A.M. 9 
•5 
85-55 
•05 
15 
A.M. 10 
One hour 
65-9 
•4 
85-5 
•05 
16 
A.M. 1 1 
One hour 
70 
•6 
85-4 
•i 
17 
A.M. 12 
One hour 
67 
67-7 
•7 
85-2 
•2 
Active. 
18 
P.M. 1 
One hour 
68 
68-7 
•7 
85 
•2 
19 
P.M. 2 
One hour 
69 
69-4 
•4 
83-6 
•05 
1-35 
20 
P.M. 3 
One hour 
69 5 
69-7 
•2 
83-55 
•05 
21 
P.M. 4 
One hour...... 
70-4 
•9 
86-1 
3-6 
2-55 
1-05 
22 
P.M. 5 
One hour 
70- 1 
7M 
1 
3-6 
2-75 
•85 
23 
P.M. 6 
One hour 
69-5 
70-4 
•9 
89-15 
2-4 
•3 
1 
1-1 
24 
P.M. 7 
One hour 
69 
70-1 
11 
90 
1-8 
•85 
•95 
25 
Aug. 20 p.m. 7 to 21 a.m. 7 Twelve hours 
68-5 
69-4 
•9 
92-6 
25-5 
2-6 
11-6 
11-3 
Sleeping. 
26 
A.M. 8 
One hour 
68-7 
69-9 
1-2 
93-9 
1-95 
1-3 
•65 
27 
A.M. 9 
One hour 
69 
70 
1 
94-65 
4-4 
•75 
2-1 
1-55 
Active. 
Total increase 
in 47 hours... 
14-85 
79-95 
35-3 
29-8 
A Table exhibiting the gradually decreasing amount of Wei 
ght and Gaseous Expen- 
diture in proportion to the length of time of fasting in a Larva of Sphinx Elpenor. 
28 
65-3 
29 
66-4 
65-1 
•2 
30 
67 
64-9 
•2 
31 
P. M. 1 
68 
64-8 
•1 
32 
P. M. 2 
69 
64-7 
•1 
33 ’ 
P.M. 3 
69-5 
64-65 
•05 
34 
69-5 
64-5 
•15 
35 
70-1 
64-4 
•1 
36 
69-5 
64-2 
•2 
Very active. 
37 
P.M. 7 
69 
64 
•2 
38 
A.M. 7 
68-5 
162-15 
1 
39 
A.M. 8 
68-7 
62 
•15 
Very active. 
40 
A.M. 9 
One hour 
69 
63-65 
3-45 
1-65 
1-8 
Total decrease 
in 23 hours.. 
1-65 
4-25 
•85 
* These Tables on the quantity of food eaten, loss and increase of weight, gaseous and fsecal expenditure, 
and temperature of the atmosphere at the time of making the observations, were made, as noticed below, in 
August 1832 ; but the two columns which indicate the temperature of the insect** were not made at that pe- 
riod, hut have been added subsequently, having been made in the summer of 1834 upon the larva of the Sphinx 
under circumstances similar to those of August 1832. Indeed from the precautions necessary to be attended 
to while taking the temperature of the insect, as noticed in the beginning of the present paper, it will be seen 
that it is impossible to make the whole of the observations here detailed upon the same individual at the same 
time, the excitement produced in the insect while handling it in order to ascertain its weight unavoidably inter- 
fering with the correctness of the observations on its temperature. Two specimens therefore of the same weight 
and age must always he employed. 
