144 THE PLUM CURCULIO. 
count was taken of the emergence of this parasite from the soil boxes, 
as shown below : 
Table LXXXII. — Record of emergence of (Sigalphus) Triaspis curculionis from plum 
curculio larvse for season, Washington, D. C, 1908. 
Lot No. 
Date 
larvae 
placed in 
soil. 
Larvae 
placed in 
soil. 
Sigalphus 
emerging. 
Percent- 
age of 
larvae 
parasit- 
ized. 
Beetles 
emerging, 
Percent- 
age of 
larvae 
trans- 
forming 
to adults. 
Percent- 
age of 
larvae 
unac- 
counted 
for. 
23... 
24... 
25.... 
26.... 
27.... 
28-59. 
May 27 
28 
30 
31 
June 1 
2 
3 
4 
9 
10 
11 
12 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
24 
June 25- 
Aug. 1 
187 
2s3 
218 
297 
281 
206 
162 
90 
171 
213 
2D.S 
203 
L57 
154 
2-: 9 
369 
172 
190 
Ml) 
296 
107 
60 
122 
106 
139 
177, 
177 
860 
0.71 
6. 88 
1.34 
5.34 
4.86 
2.47 
11.11 
1.15 
6.17 
1.44 
.49 
1.27 
1.95 
2 
.54 
4 
2.33 
1 
.53 
1 
.34 
1 
.93 
1 
1.67 
1 
.94 
3 
2.16 
1 
. ;>( i 
85 
103 
38 
45. 45 
36.40 
17. 43 
8.41 
25.27 
17.96 
4.32 
26. 67 
11.49 
1.65 
2.88 
2.46 
23.57 
11.04 
5.62 
22.76 
48.84 
22.11 
4.29 
17.57 
17.76 
33.33 
31.97 
29.25 
12.95 
16. 57 
6. 21 
21.51 
Total. 
6.027 
1.113 
18.47 
54.55 
62.89 
75. 69 
90.25 
69. 39 
77.18 
93.21 
62.22 
87.36 
92. 18 
95. 68 
97.05 
75.16 
87.01 
94.38 
76.70 
48.83 
77.36 
95.71 
82.09 
81.31 
65. 00 
68. 03 
69. 81 
84.89 
83. 43 
93.23 
78.49 
79.85 
The percentage of parasitism, it will be noted, varied widely — ■ 
from less than one-half of 1 per cent to 11.11 per cent on June 4. The 
average percentage of parasitism for the season is small, and it seems 
probable that the insect during 1908 was less abundant than normal. 
Similar records of parasites emerging from lots of larvas taken over 
the whole season from Elberta peaches were made at Siloam Springs, ■ 
Ark., during 1908, as set forth in Table LXXXIII. 
Table LXXXIII. — Record of emergence of (Sigalphus) Triaspis curculionis for season, 
Siloam Springs, Ark., 1908. 
Lot No. 
Date larvse entered soil. 
Larvae. 
Sigalphus 
emerging. 
Percent- 
age of 
larvae 
parasit- 
ized. 
Beetles 
emerging. 
Percent- 
age of 
larvae 
trans- 
forming 
to adults. 
Percent- 
age of 
larvae 
unac- 
counted 
for. 
1 
May 12-16 
May 17-19 
328 
573 
965 
550 
629 
719 
532 
449 
394 
107 
81 
61 
637 
3 
18 
21 
19 
18 
5 
1 
0.91 
3 .14 
2.18 
3.45 
2. 86 
.97 
.94 
. 22 
50 
124 
131 
123 
253 
211 
293 
124 
102 
49 
50 
34 
230 
15.24 
21. 6 4 
13.58 
22. 36 
40.22 
29. 35 
55. 08 
27. 62 
25. 89 
45.79 
61.73 
55.74 
36.11 
83.85 
2 
75.22 
3 
May 20-22 
84 27 
4 
May 23-25 
74.19 
5 
May 26-28 
6 
May 29-31 
69 68 
7 
43 98 
8 
72 16 
9-10 
June 7-12 
74.11 
11 
June 13-15 
4 
4 
2 
3.74 
4.94 
3.28 
50.47 
12 
June 16-18 
33 33 
13 
June 19-21 
40.98 
14-23 
June 22-Aug. 13 
63.89 
Total. 
6,025 
102 
1.(9 
1,774 
29.44 
68.87 
