MR. NEWPORT ON THE TEMPERATURE OF INSECTS. 
317 
Table X. 
Showing that the Temperature is greater and the Pulsation more frequent in the larvm 
of those insects which undergo their metamorphoses in the open air, as the Puss 
Moth ( Centra vinula), than in those which undergo their ciianges in the earth, as 
the Sphinx ligustri , and others. 
No. of Exp. 
Species. 
Period of observation. 
Atmo- 
sphere. 
Insect. 
Difference. 
Pulsation, | 
to 
1834. h m 
i 
Cerura vinula (larva), A. 
July 16 a.m. 9 
68 
81-5 
13-5 
99 
7th day. 
2 
Cerura vinula (larva), A. 
A.M. 10 
70-5 
72-8 
2-3 
64 
3 
Cerura vinula (larva), A. 
A.M. 10 15 
72-7 
74-3 
1-6 
72 
4 
A.M. 10 30 
66 
5 
A.M. 1 1 
73-5 
64 
6 
Cerura vinula (larva), A. 
A.M. 11 15 
73-5 
74-8 
1-3 
71 
7 
Cerura vinula (larva), A. 
17 a.m. 5 30 
69-5 
70 
•5 
47 
8th day. 
8 
Cerura vinula (larva), A. 
A.M. 7 
71-4 
72-3 
•9 
64 
9 
Cerura vinula (larva). A. 
a.m. 7 30 
72 
72-9 
•9 
57 
10 
Cerura vinula (larva), A. 
a.m. 7 45 
72-3 
72-9 
•6 
55 
11 
Cerura vinula (larva), A. 
a.m. 8 
72-5 
73-2 
•7 
56 
12 
Cerura vinula (larva), A. 
A.M. 9 
72-2 
73-2 
1-0 
68 
13 
Cerura vinula (larva), A. 
a.m. 9 15 
72-2 
73-3 
1-1 
59 
14 
Cerura vinula (larva), A. 
a.m. 9 30 
73-1 
74-2 
11 
70 
15 
Cerura vinula (larva), A. 
a.m. 9 45 
73-2 
74-4 
1-2 
68 
16 
Cerura vinula (larva), A. 
A.M. 10 15 
73-2 
74-3 
11 
67 
17 
Cerura vinula (larva), A. 
A.M. 11 
74-4 
75-7 
1-3 
72 
18 
Cerura vinula (larva), A. 
a.m. 12 45 
78-5 
80 
1-5 
77 
19 
Cerura vinula (larva), A. 
P.M. 1 15 
78-5 
80-2 
1-7 
78 
20 
Cerura vinula (larva), A. 
p.m. 4 45 
80-5 
81-9 
1-4 
88 
21 
Cerura vinula (larva), A. 
p.m. 5 30 
80-4 
81-2 
•8 
88 
22 
Cerura vinula (larva), A. 
18 A.M. 7 
75-2 
761 
•9 
66 
9th day. 
23 
Cerura vinula (larva), A. 
a.m. 8 30 
75-4 
76-3 
•9 
68 
24 
Cerura vinula (larva), A. 
A.M. 9 
76-1 
77 
•9 
72 
25 
Cerura vinula (larva), A. 
19 A.M. 7 
70-7 
71-4 
•7 
60 
10th day. 
26 
Cerura vinula (larva), A. 
a.m. 7 30 
70-9 
71-8 
•9 
60 
27 
Cerura vinula (larva), A. 
A.M. 8 
70-7 
71 
0-3 
54 
28 
Cerura vinula (larva), B. 
16 a.m. 10 30 
71-8 
72-3 
•5 
49 
29 
Cerura vinula (larva), B. 
A.M. 10 45 
71-8 
72-5 
*7 
30 
Cerura vinula (larva), B. 
17 a.m. 5 30 
68-5 
68-7 
•2 
31 
Cerura vinula (larva), B. 
F.M. 1 15 
78-5 
78-9 
•4 
50 
32 
Cerura vinula (larva), B. 
p.m. 4 45 
78-9 
79-2 
•3 
46 
33 
Cerura vinula (larva), B. 
19 a.m. 7 30 70-9 
71-3 
•4 
31 
Remarks. 
/ Just captured, and confined in my box in my 
\ pocket, perspiring copiously. 
Insect active, but more calm ; pulse full, sinking. 
Very active, in constant motion, pulse small. 
Has rested a few minutes, asleep. 
Has been sleeping half an hour. 
Aroused and excited. 
Has been sleeping during several hours. 
Moderately active. 
At rest. 
Sleeping. 
Still sleeping. 
Active, and feeding. 
Resting. 
Feeding. 
Still feeding. 
Active, but not feeding. 
Very active. 
Very active. 
Still very active. 
Moderately active. 
Less active. 
Sleeping, or quiet. 
Quiet. 
Aroused and feeding. 
Changing colour for transformation. 
More discoloured. 
Preparing to spin its cocoon. 
After feeding 36 hours, just fed, sleeping. 
A little active. 
Is spinning its cocoon for transformation. 
Still spinning its cocoon. 
Still spinning. 
Has been retarded from changing. 
But it is not only at the period of change into the pupa state that the pulsation is 
greatly reduced, the same thing takes place immediately before each change of skin 
in the larva, as shown on Table IX. Nos. 9 , 23 , 34 , and 63 . At those periods the 
temperature and respiration are also reduced, and the insect ceases to eat ; but soon 
after the change of skin has taken place the respiration and temperature are again 
increased ; but the average rate of pulsation is never so great as before the previous 
change of skin, and it continues to be diminished at each succeeding change. 
The following observations made on larvae of Sphinx ligustri of the same age, at 
different periods after entering their fifth or last skin, and when the pulse in each was 
regular and full, will further illustrate the general accordance which exists between 
the rate of pulsation and amount of temperature when the pulsation has not been 
accelerated by inordinate activity or other causes. 
2 t 2 
