124 REPORT UNITED STATES ENTOMOLOGICAL COMMISSION. 
Table VII. — Monthly and annual rainfall in inches from 1872 to 1878 — Continued. 
■years and stations. 
Annual. 
January. 
i 1 
3 
u 
S 
a 
E 
m 
April. 
May. 
A 
z 
July. 
August, 
September. 
October. 
N.i\ embei 
% 
e 
e 
» 
i — ■ 
-COLORADO 8PRING6, 
COLO. 
In. 
In. 
In. 
In. 
In. 
In. 
In. 
In. 
In. 
In. 
In. 
In. 
In. 
1874 
16.53 
0.06 
0. 54 
0. 50 
3. 55 
5.90 
0. 20 
0.81 
0. 91 
3.37 
0. 19 
0.35 
0. 15 
1875 
17. 37 
0.24 
0.56 
1.12 
0. 30 
L 03 
1.82 
6.07 
2. 39 
2.23 
0.13 
1. 19 
0.29 
1876 
0. 12 
0.19 
0.63 
0. 52 
3.83 
1.89 
6A1NT LOUIS, MO. 
0.55 
2. 01 
L70 
1873 
o. Do 
1. 52 
2. 10 
D. £t 
6. 68 
& OA 
d. yo 
0. 07 
3. 02 
3. 27 
1. 64 
5. 10 
37. 79 
3. 04 
3. 66 
4. 36 
3 43 
3. 70 
2. 00 
6.71 
4 70 
2. 32 
1. 09 
2. 32 
1. 46 
.1875 
42.99 
0.54 
2. 59 
4. 08 
2.53 
5. 48 
10. 84 
9. 49 
2.66 
0.24 
1.23 
0. 89 
2. 42 
1876 
48. 46 
4. 75 
2. 86 
6. 90 
2. 25 
3.13 
6. 43 
6.90 
5.03 
7.63 
1.66 
1.74 
0. 18 
1877 : 
41.26 
1.24 
0.88 
3.41 
2.86 
3.11 
8.69 
2.88 
2. 61 
3.56 
4.92 
3. 76 
3. 34 
1878 
2.36 
1.69 
2.79 
6. 74 
4.63 
2.40 
SANTA KE, H. MEX. 
0.25 
0. 01 
0. 04 
1873 
9. 47 
0.55 
0. 14 
0. 15 
0. 26 
0.33 
L 72 
1.02 
2.79 
1.23 
o. o; 
0. 38 
0. 83 
19.83 
1.39 
1. 60 
L 51 
1.71 
0. 70 
0. 54 
3.92 
1.73 
1.42 
2. 47 
0.58 
2. 26 
18.97 
0.67 
0. 72 
L 37 
0.33 
0.88 
0. 33 
6. 91 
1.59 
4. 14 
0.06 
1.50 
0. 47 
1876 
15. 07 
0.61 
0. 40 
0.64 
0. 46 
0.83 
1.62 
5.43 
2. 13 
0.85 
0.75 
0.97 
0.38 
1877 
13. 15 
0.18 
i «8 
0. 14 
1.83 
0.92 
0. 13 
3.54 
1.72 
0.96 
1.32 
0.70 
0.63 
1878 
0.21 
0.89 
0.73 
0.22 
1.01 
3.18 
FORT GIBSOJf, DiD. T. 
1873 
2.80 
L97 
3.66 
1874 
38.88 
3. 69 
3.44 
2. 91 
5.83 
3.54 
3.38 
1.99 
1.54 
4. 41 
0. 81 
4.64 
2.70 
1875 
44. 10 
0.64 
0. 73 
2.48 
8.74 
5.59 
3.52 
10.93 
4.27 
1.34 
1. 19 
2.26 
2. 41 
.1876 
35. 48 
4.94 
0. 61 
5.67 
1.85 
1.94 
6.82 
6.06 
0.94 
2. 43 
1. 10 
2.89 
0.20 
1877 
46.79 
0.29 
1.47 
2.27 
7.77 
4.82 
7. 74 
2.89 
3.78 
2.21 
a 36 
4. 19 
3.00 
1878 
2. 79 
2.40 
1.44 
2.83 
7.52 
6.61 
We propose to discuss first the record of temperature ; but in order 
to do this in a way to be clearly and easily understood, it is necessary 
to consider each point or bearing separately, and so far as possible 
tabulate the results. 
As heretofore intimated, it is unnecessary to take any further uotice 
of the annual mean temperature ; we shall therefore confine our discus- 
sion to the monthly means as shown in Table VI. 
If the excessive development of locusts depends upon unusual heat 
.as one of the necessary meteorological influences, and no adequate va- 
riation is shown in the annual means, it ought to appear in the monthly 
means, for it is absurd to suppose it depends upon the temperature of 
one or two days, and a considerable variation in several days will be 
shown in the monthly means. 
If, after all, this excessive development does not depend so much upon 
the absolute degree of heat above the normal condition as upon the 
absence of excessive changes at the periods when they are most easily 
affected, then a careful examination and comparison of the monthly 
means ought to reveal the particular months or periods of the year in 
which these excessive changes are most likely to occur. If it depends 
upon the sum of the heat — that is. the number of hours they are ex- 
