THE FLIGHT ACTIVITIES OP THE HONEYBEE 13 
Table 1. — A seasonal survey of some ohsenxitimis for entire days — Con. 
Total 
exits 
Total 
returns 
Loss 
Gain 
Per 
cent 
returns 
are of 
exits 
Loss or 
gain in 
weight 
of 
hive 
Aver- 
age 
load per 
Per 
cent of 
Temperature in shade dur- 
ing period of observations 
Date 
return- 
ing 
bee 
sun- 
shine 
Minimum 
Maximum 
July 3... 
28,918 
3,206 
16, 384 
23, 954 
15, 267 
19, 897 
17, 619 
22, 973 
19, 509 
17, 947 
3,302 
14, 976 
17, 935 
13,284 
14, 372 
21, 502 
8,956 
20,916 
18, 376 
23, 881 
17, 460 
10, 079 
3,687 
12,003 
8,683 
24, 074 
2,506 
14, 404 
22,635 
14, 737 
20,003 
17, 305 
21, 784 
20,281 
17, 931 
3,148 
16, 182 
18, 968 
14, 808 
14, 498 
21, 828 
9,131 
21, 535 
19, 389 
24, 974 
18,006 
10. 087 
3,963 
13,054 
8,861 
4,844 
700 
1,980 
1,319 
530 
"'314' 
1,189 
....... 
154 
'"ioe" 
■■■772' 
"i,"206' 
1,033 
1,524 
126 
326 
175 
619 
1,013 
1,093 
546 
8 
276 
1,051 
178 
83.25 
78.17 
87.92 
94.49 
96.53 
100.53 
98.22 
94.82 
103. 96 
99.91 
95.34 
108. 05 
105. 76 
111.47 
100.88 
101. 52 
101. 95 
102. 96 
105. 51 
104. 58 
103. 13 
100.08 
107. 49 
108. 76 
102. 05 
Grams 
-100 
Milli- 
grams 

53 

24 
94 
57 
82 
72 
59 
100 
68 

46 
11 
58 
35 
6 
100 
66 
85 
85 
31 
3 
49 
80 
°C. 
22 
19 
15 
13.5 
20 
20.5 
21 
21.5 
23.5 
23 
19.5 
18 
19.5 
20 
20.5 
21.5 
20 
15 
21 
19 
22 
20 
19 
20 
15 
°F. 
71.60 
66.20 
59 
56.30 
68 
68.90 
69.80 
70.70 
74.30 
73.40 
67.10 
64.40 
67.10 
68 
68.90 
70.70 
68 
59 
69.80 
66.20 
71.60 
68 
66.20 
68 
59 
°.c. 
32.5 
22 
25 
28 
31.5 
31.5 
29 
31 
35 
34 
23 
29 
28 
33 
34.25 
31 
25.5 
30 
30 
32 
32.25 
29 
24 
28 
29.5 
°F. 
90.50 
71.60 
5... 
6._. 
8 
-410 
-360 
77 
82.40 
88.70 
9... 
10... 
11-. - 
12... 
13 
-150 
-180 
-80 
-320 
88.70 
84.20 
87.80 
95 
93.20 
14... 
15... 
16... 
17 . 
-170 
-220 
000 
73.40 
84.20 
82.40 
91.40 
18 
93.65 
19... 
20... 
21... 
22 .. 
-340 
-330 
-340 
87.80 
77.90 
86 
86 
23... 
24... 
25 
-370 
-240 
89.60 
90.05 
84.20 
26... 
27... 
29... 
-70 
-120 
-250 
75.20 
82.40 
85.10 
Total. . 
2,434,666 
2,357,769 
Throughout the honey flow and for the next five weeks after its 
close, the total daily exits show a gradual falling off, until the sixth 
week, when there is a rather sudden falling off from 40,000 to a num- 
ber fairly constant for a period throughout July, during which the 
total nmnber of possible daily exits is about one-third of those 
occurring on the best days in the honey flow in May. This indi- 
cates that the emergence of young bees is not sufficient to replace the 
high death rate following the honey flow, until the majority of 
these old bees have died off. There is, of course, every gradation 
in flight from the best days in the honey flow to other days on 
which practically no flights take place. 
It is noticed that on heavily overcast days, with or without 
occasional precif)ation, the low intensity of light seems to be the 
strongest factor inducing the bees to stay at home. Days that are 
bright and sunny, but ushered in by a low morning temperature, 
show some remarkable differences in the totals for the day, amounting 
in certain cases to as much as 40 to 50 per cent of the possible flight 
for the period. For each day throughout the season that does not 
come up to the optimum flight curve, some factor or group of 
factors has been at play, modifying the flights to a less or greater 
degree. Such data, however, do more than substantiate the well- 
known facts concerning bee behavior indicated above, for they also 
give a means of measuring the exact influence of any factor or group 
of factors. 
