114 
The male refused to mate with any more females after the twelfth. 
Table XIII shows the results of these observations : 
Table XIII. — Offspring produced as the result of mating one male Aphidius with 12 
females. 
Female 
Offspring. 
Female, 
cage No. — 
mated with 
male from 
cage No. — 
Males. 
Females. 
180 
180 
29 
55 
181 
180 
14 
33 
182 
180 
21 
30 
183 
180 
35 
41 
184 
180 
2 
8 
185 
180 


186 
180 
13 
30 
187 
180 
39 
25 
188 
180 
1 

189 
180 
50 

190 
180 
8 
9 
191 
180 
26 
16 
From these data it appears that all of the eggs from the last few 
females were not fertilized, as Mr. Kelly finds that females predom- 
inate when the eggs are properly fertilized. Table XIV illustrates 
this latter point. 
Table XIV. — Offspring of Aphidius produced from eggs properly fertilized. 
Offspring. 
Cage No. — 
Males. 
Females. 
197 
39 
67 
297 
15 
20 
299 
13 
33 
300 
24 
40 
302 
20 
34 
304 
16 
50 
306 
47 
12 
333 
115 
15 
403 
26 
41 
404 
38 
93 
405 
Total . . 
26 
44 
379 
429 
1 These two females were apparently unfertilized, although they were supposed to have mated, as they 
give about the same results as some of the unmated females. If these two be eliminated it will be seen that 
the females are far in excess of the males. 
PARTHENOGENESIS. 
In all of the studies of parthenogenesis care was taken to preserve 
both parents and offspring, the individuals of each family or brood 
being preserved and kept entirely separate for future systematic 
studies, which were later carried out by Mr. Viereck. 
The first record of parthenogenesis of this species was published in 
the Proceedings of the Entomological Society of Washington, 1 by 
the junior author, whose attention was first called to this phenomenon 
i Proc. Ent. Soc. Wash., vol. 10, Nos. 1-2, September 15, 1908, pp. 11-13. 
