1929] 
Stylopized Vespidm 
275 
parasites appear between the sternites, there are seven 
parasites present in the one wasp. 
In an earlier paper (Salt, 1927) it has been shown that 
in Odynerus ( s. 1.) the female parasites usually occur under 
the third abdominal segment of the host and the males be- 
hind, under the fourth segment; while in Polistes the male 
parasites usually lie before, under the third and fourth 
segments, the females behind under the fifth. The same 
curious difference, together with additional facts, appear 
from a consideration of the cases recorded in our list; 
where the parasites are situated as follows : 
Under abdominal segment number 
2 
3 
U 
5 
6 
In Eumenes . . . 
8 parasites 
— 
1 
4 
— 
— 
2 parasites 
— 
10 
— 
— 
— 
In Odynerus . . . 
8 parasites 
— 
5 
17 
7 
— 
2 parasites 
1 
25 
24 
— 
— 
In Pachodynerus. . 
8 parasites 
— 
1 
9 
1 
— 
2 parasites 
3 
13 
4 
— 
— 
In Ancistrocerus 
8 parasites 
— 
2 
12 
— 
— . 
$ parasites 
— 
8 
3 
— 
— 
In Monobia . . . 
8 parasites 
— 
— 
■ — 
3 
_ 
$ parasites 
— 
3 
3 
— 
— 
In Montezumia . . 
8 parasites 
— 
— 
1 
2 
— 
$ parasites 
— 
— 
1 
— 
— 
In Belonogaster . . 
8 parasites 
— 
2 
5 
1 
1 
$ parasites 
— 
1 
5 
— 
— 
In Polistes .... 
8 parasites 
5 
26 
27 
5 
1 
2 parasites 
— 
3 
3 
14 
1 
In Vespa .... 
8 parasites 
— 
— 
3 
— 
— 
2 parasites 
— 
— 
— 
4 
— 
For the Masaridinse, Raphiglossinse, and Zethinse the 
numbers are too low to be significant, and are not given. 
The parasites of Eumenes clearly take the same position as 
those of Odynerus (s. L), the females preferring a position 
under the third, the males under the fourth abdominal 
segment. Our separate notes for Odynerus (s. st.), Pachody- 
nerus, and Ancistrocerus serve to show that in these genera 
the parasites act similarly, and that our former treatment 
