658 
Journal of Agricultural Research 
Vol. XXVIII, No. 7 
the detailed data of Tables I and II, indicate that the 50 seeds of each sample 
were in some instances heavily infested. Upon examination all stages of the 
bruchids were found dead in seeds, and no development occurred in seeds held 
for subsequent observation. 
Table III.— Data on the penetration of hydrocyanic-acid gas into 240 -pound sacks 
of chick-peas infested by Bruchus quadrimaculatus and arranged as shown in 
figure 1, c. All bruchids reached and killed by the gas 
Sack 
No. 
Sam¬ 
ple 
No. 
Number of— 
Sack 
No. 
Sam¬ 
ple 
No. 
Number of— 
Sack 
No. 
Sam¬ 
ple 
No. 
Number of— 
Eggs 
Emer¬ 
gence 
boles 
Eggs 
Emer¬ 
gence 
holes 
Eggs 
Emer¬ 
gence 
holes 
12 .. 
1 
98 
4 
13 
1 
97 
2 
14 
1 
222 
10 
2 
94 
2 
2 
52 
0 
2 
155 
6 
3 
67 
2 
3 
3 
118 
8 
4 
29 
0 
4 
44 
i 
4 
93 
8 
5 
93 
3 
5 
79 
3 
5 
95 
11 
6 
164 
6 
6 
101 
7 
6 
111 
12 
15.. 
1 
260 
14 
16 
1 
94 
10 
17 
1 
429 
17 
2 
94 
15 
2 
72 
8 
2 
228 
2 
3 
90 
4 
3 
97 
7 
3 
213 
3 
4 
107 
5 
4 
135 
15 
4 
247 
8 
5 
110 
7 
5 
159 
13 
5 
291 
7 
6 
152 
0 
6 
291 
39 
6 
383 
12 
18.. 
1 
45 
0 
19 
1 
358 
43 
20 
1 
528 
53 
2 
41 
1 
2 
114 
5 
2 
196 
2 
3 
48 
4 
3 
86 
1 
3 
75 
2 
4 
73 
4 
4 
47 
0 
4 
42 
1 
5 
69 
1 
5 
45 
0 
5 
32 
1 
6 
75 
3 
6 
56 
0 
6 
82 
5 
21 . 
1 
54 
10 
22 
1 
389 
33 
23 
1 
108 
2 
2 
45 
7 
2 
204 
3 
2 
64 
1 
3 
42 
4 
3 
45 
2 
3 
98 
3 
4 
32 
3 
4 
40 
6 
4 
199 
2 
5 
5 
56 
3 
5 
331 
3 
6 
205 
50 
6 
39 
6 
6 
498 
19 
24. 
1 
315 
18 
25 
1 
321 
7 
26 
1 
291 
4 
2 
137 
15 
2 
214 
16 
2 
307 
10 
3 
58 
2 
3 
128 
2 
3 
146 
6 
4 
55 
2 
4 
33 
2 
4 
89 
2 
5 
34 
4 
5 
37 
0 
5 
69 
1 
6 
47 
0 
6 
41 
1 
6 
47 
4 
27... 
1 
115 
12 
28 
1 
313 
13 
29 
1 
132 
8 
2 
98 
7 
2 
300 
3 
2 
84 
3 
3 
83 
2 
3 
60 
2 
3 
69 
2 
4 
131 
2 
4 
39 
1 
4 
64 
1 
5 
277 
13 
5 
72 
0 
5 
157 
2 
6 
195 
6 
6 
73 
0 
6 
334 
27 
30__ 
1 
128 
3 
31 
1 
126 
1 
32 
1 
292 
26 
2 
60 
2 
2 
52 
1 
2 
3 
67 
1 
3 
52 
0 
3 
4 
104 
1 
4 
30 
0 
4 
5 
165 
4 
5 
41 
0 
5 
6 
227 
6 
6 
57 
3 
6 
33_ 
1 
34 
1 
83 
1 
35 
1 
201 
11 
2 
81 
2 
2 
53 
0 
2 
120 
8 
3 
35 
0 
3 
51 
0 
3 
119 
0 
4 
37 
1 
4 
78 
1 
4 
76 
4 
5 
31 
0 
5 
178 
7 
5 
73 
5 
6 
49 
0 
6 
206 
2 
6 
132 
9 
INSECTS OTHER THAN BRUCHIDS 
The data on infestations recorded above deal only with Bruchus quadri¬ 
maculatus. In. Warehouse No. 4, of brick construction and very tight, about 
110 by 66 by 13 feet, the sacks were stacked only four and five deep. The seeds 
in them contained some infestations by bruchids, but were more interesting 
because of severe infestations by Rhizopertha dominica and much slighter in¬ 
festations by Lasioderma serricorne. The Rhizopertha infestations had in cer¬ 
tain sacks reduced the seeds to a condition rendering them easily crushed be¬ 
tween the fingers. The Lasioderma infestations were primary but with never 
more than one or two larvae or pupse in a seed. This warehouse was fumigated 
in the same manner as Warehouses 1 to 3, with the result that examinations of 
