28o 
Journal of Agricultural Research 
Vol. VIII, No. 7 
Table I. —Emergence of adults of Tetrasiichus bruckophagi from hibernated larvm 
Period of emergence. 
Male. 
Female. 
Mar. 1-15... 
Mar. 16-31....... 
3 
6 
10 
7 
21 
5 
18 
4 
1 
1 
76 
22. 15 
I 
1 
6 
17 
3 i 
52 
109 
48 
2 
f 
Apr. 1-15.. 
Apr. 16-30.. 
May 1—15. 
May 16-31. 
June 1-15. 
Tune 16-30. 
July i-is ..... 
July 16-31. 
Aug. i-ic . 
Total.. 
267 
77.8 
Percentage of sexes.. 
Table II .—Emergence of adults of the summer generations of Tetrastichus bruchophag 
as they appeared in the laboratory, from alfalfa seed infested with B. funebris and taken 
from the fields 
Period of emergence. 
Male. 
-■- 
Female. 
Tuly I-IS. 
1 
47 
7 i 
3 
20 
417 
243 
72 
Tuly 16-31.,............ * * 
Aug. 1-15. 
Aug. 16-31.„.;.. 
Sept. 1-15 1 .. 
Sept. 16-30 1 ... 
Oct. 1-15 1 .!. 
Oct. 16-31.•.. 
00 Tf- 
12 
6 
Nov. 1-15. 
Nov. 16-30. 
Total.. 
134 
14. 82 
770 
8S- J 7 
Percentage of sexes. 
1 Adults emerged freely, but counts of sexual forms were not made. 
OVIPOSITION 
This minute parasite searches over the green alfalfa seed pods for 
those containing seeds infested by B . funebris . When a suitable place is 
found for oviposition, the female suddenly lowers the tip of her abdomen 
to the surface of the seed pod and forces the ovipositor into the seed pod 
and infested seed, placing an egg upon the larva of its host. The time 
required for oviposition varies from about 20 seconds to 1 minute. 
LARVA 
Development. —The larva of T. bruckophagi upon hatching from.the 
egg finds itself upon the host. In the course of one or two days it takes a 
more or less permanent position and begins to feed. A very rapid growth 
follows the first feeding of this parasite. In the course of its develop- 
