JOURNAL OF ECONOMIC ENTOMOLOGY 
498 
Table 1. Parasites of the San Jose Scale 
[Vol. 17 
Parasites 
Place collected 
Aphelinus 
Aphelinus 
Prospal- 
Ablerus 
Signiph- 
Periss- 
and Host 
mytilasp- 
fuscipen- 
tella per- 
clisio- 
ora pulch- 
opterus 
collector 
Fort Valley, Ga. 
idis LeB. 
nis How. 
niciosi Tow. 
campae 
Ashm. 
ra Gir. 
sp. 
0. I. Snapp Peach 
Aurora, Ill. 
0 
0 
0 
0 
0 
0 
C. C. Compton Apple 
Unknown 
0 
0 
39 
0 
0 
2 
Unknown Apple 
San Pierre, Ind. 
0 
0 
0 
0 
0 
0 
J. J. Davis Apple 
Lafayette, Ind. 
0 
0 
1 
0 
0 
0 
J. J. Davis Apple 
Bicknell, Ind. (1) 
18 
17 
512 
1 
8 
0 
J. J. Davis Apple 
Bicknell, Ind. (2) 
0 
4 
85 
0 
0 
1 
J. J. Culver Apple 
Washington, Ind. 
0 
0 
24 
0 
0 
0 
J. J. Davis Apple 
Bentonville, Ark. 
0 
0 
14 
0 
0 
0 
A. J. Ackerman Apple 
Geneva, N. Y. 
0 
0 
471 
0 
0 
0 
Geneva Exp. Sta .Apple 
0 
2 
50 
0 
0 
0 
Total. 
18 
23 
1196 
1 
8 
3 
Parasites of the Oyster Shell Scale 
Aurora, Ill. 
C. C. Compton Apple 99 0 0 0 0 0 
An examination of Table 1 will show that of the parasites emerging 
from the San Jose scale only one species, Prospaltella perniciosi Tow., 
was present in any appreciable number or in a majority of the localities 
from which twigs were received. In the case of the oyster shell scale 
only one species, Aphelinus mytilaspidis LeB., emerged. 
In order to determine the degree or amount of parasitism it was 
necessary to make a count of the scales on the twigs and in this count all 
male and very immature female scales were omitted. No account was 
taken of the probability that a number of parasites died within the host. 
In Table 2 will be found the number and length of the twigs, the 
number of scales, the number of parasites and the per cent of parasitism 
for each locality from which twigs were received. 
