THE BEOAD-BEAN WEEVIL. 
11 
pending on the weather conditions, from one month to a possible 
eight months. Table VII gives a summary of the life-history 
records. 
Table VII. — Life history of the broad-bean weevil in California. 
Locality. 
Eggs 
laid. 
Hatched. 
Dura- 
tion of 
egg 
stage. 
Pupated. 
Dura- 
tion of 
larva 
stage. 
Adult. 
Dura- 
tion of 
pupa 
stage. 
Died. 
Dura- 
tion of 
adult 
stage. 
Total 
length 
of 
life. 
Pasadena . 
Hay ward . 
1917. 
May 3 
May 11 
1917. 
May 15 
May 24 
Days. 
12 
13 
1917. 
Aug. 19 
Auj. 29 
Sept. 3 
1918. 
July 26 
Aug. 5 
Aug. 22 
Aug. 5 
...do 
Aug. 22 
Aug. 12 
Sept. 10 
Aug. 5 
Aug. 30 
Days. 
96 
98 
""96" 
80 
94 
97 
106 
64 
87 
1917. 
Aug. 27 
Sept. 8 
Sept. 12 
1918. 
Aug. 4 
Aug. 21 
Aug. 30 
Aug. 12 
...do 
Aug. 30 
Aug. 28 
Sept. 17 
Aug. 13 
Sept. 13 
Days. 
8 
10 
9 
10 
16 
8 
7 
7 
8 
16 
7 
8 
14 
Sept. 27, 1917 
Feb. 8, 1918 
Dec. 7, 1917 
Days. 
31 
152 
86 
Days. 
147 
273 
1918. 
Apr. 9 
1918. 
...do 
Apr. 28 
May 6 
May 7 
Apr. 28 
May 17 
May 17 
May 17 
Mar. 14 
May 5 
May 17 
May 20 
May 7 
May 27 
June 2 
June 4 
Mar. 28 
9" 
11 
13 
9 
10 
16 
18 
14 
Alhambra. 
Alhambra. 
Alhambra. 
Apr. 23,19191 
Dec. 26,1918 
May 31,19191 
253 
137 
274 
359 
235 
393 
Alhambra. 
Alhambra. 
Dec. 6, 1918 
Nov. 30, 1918 
114 
78 
203 
197 
12.5 
90 
10 
140 
258 
1 Theoretical, showing possible life history from two records. 
SEASONAL HISTORY. 
Egg laying begins about the middle of March, is heaviest in April, 
and extends a little beyond the middle of May. The larval period 
is from the latter part of March to the middle of October. Pupae 
can be found from the first of August to the latter part of October, 
and adults from the middle of August to about the following June. 
Tables VIII and IX show the actual records of the seasonal history 
for 1917 and 1918. 
Table VIII. — Seasonal history of B melius mftmanus in Pasadena and Alhambra, 
Calif. 
Year. 
First 
eggs 
ob- 
served. 
Last 
eggs 
ob- 
served. 
First 
eggs 
hatched. 
Last 
eggs 
hatched. 
First 
full- 
grown 
larvae. 
Last 
full- 
grown 
larvae. 
First 
pupa. 
Last 
pupa. 
First 
adult. 
Last 
adult. 
1917 
Mar. 23 
Mar. 14 
May 20 
May 19 
Aug. 1 
July 16 
Oct. 19 
Sept. 26 
Aug. 3 
July 18 
Oct. 22 
Sept. 28 
Aug. 10 
July 25 
(i) 
1918 
Mar. 28 
June 4 
About June 1, 1918. 
