G. S. Graiiam-Smitii 
349 
* sun - 
^ C\* 
V 
°c 
3 <M 
•V 
«C> 
a Cl 
'M 
co £*-5 
Os e-5 ^ 
CO <M 
»c Cl 
C) 
^O' 
co 
a 
*o o«o 
os 
C\J 
k-O Ol 
TTTTTTTTTTTT1 
rprrii 
110 6 F. 
100° F. 
90° F. 
80° F. 
70° F 
60° F 
50° F 
40° F. 
110° F. 
100° F. 
90° F. 
80° F. 
70° F. 
60° F. 
50° F 
40° F. 
1915 _ 
1916 _ 
Flies 
Mill] caught 
1 jn 
11 i i;i i i 1 1 11 i i!i 11 i i i i i n i i i!i i i n i i i i 
trap 
600 
500 
400 
300 
200 
100 
0 
1400 
1300 
1200 
1100 
1000 
900 
800 
700 
600 
500 
400 
300 
200 
LOO 
0 
700 
600 
500 
400 
300 
200 
100 
0 
Chart 1. Weekly records of flies caught in traps baited with excrement and of “sun 
temperature in the years 1915, 1916, 1917. 
