PARASITES OF SPIDERS AND THEIR EGGS. 59 
Micaria (unknown). Pezomachus obscurus. Ngee parasite. 
. Temiteles micarivora., Hs i 
Prosthesima furcata. Hemiteles prosthesimie. ° UE 
Drassid (unknown). THemiteles drassi. 7 ee 
Drassus lapidicolens. Polysphinecta tuberosa.* Body parasite. 
Agroeca brunnea. THemiteles tenerrimus.* Egg parasite. 
Ui by Hemiteles aranearum.* i i 
ue as Tlemiteles formosus.* ; Body parasite. 
Ee * Pezomachus fasciatus.* Egg parasite. 
se as Pezomachus corruptor.* = : 
ff ‘f Pezomachus proximus. Hh i 
“e - Pezomachus zonatus.* - ie 
Drassid (unknown). Eupelmus drassi. ss x 
LATERIGRADE, SALTIGRADE, CITIGRADE. 
Laterigrade cocoon. Pezomachus gracile. Egg parasite. 
Teius (unknown). Polysphincta n. sp. Body parasite. 
Saitis pulex. Acoloides saitides. Egg parasite. 
Phidippus morsitans. tne ie 
Pardosa luteola. Polysphincta , Body parasite. 
bad 
IX. 
It is difficult to make any correct generalizations from the data in hand 
on this most interesting chapter in the biology of spiders, since the species 
or even genus of the host is in so many cases unknown, even 
when the parasite has been determined. But a few hints appear 
from the study of the above lists and preceding facts which 
may serve to at least open the way for others who in the future may 
have more perfect information. 
First, it is evident that the exclusive occupation of a specific host by a 
specific quest is not the fixed rule. For example, the eggs of Argiope co- 
phinaria are parasitized by one species of Pezomachus, two of Pimpla, and 
two (though perhaps as hyperparasites) of Chrysocharis. Again, Epeira 
diademata of Europe serves as body host for three species of Polysphincta, 
and its eggs as host of one each of Hemiteles and Pimpla. Once more, 
Agroeca ‘prunnea of Europe has one species of Hemiteles for a body para- 
site (?), and for egg parasites two species of Hemiteles and three of 
Pezomachus. Thus it would appear that the occupation of any specified 
host is not limited to any specific guest, but has a wide possible range, 
both as to species and genera. 
Second, the preference of any specific quest is not always confined to one 
specific host. Thus, Polysphincta carbonator, a European body parasite, is 
reported as guest upon three species of Epeira; and Polysphincta bodps 
upon both Theridion and Epeira. 
Third, the guests are not absolutely separated by their habits into distinct 
groups of body parasites, on. the one hand, and nest parasites on the other. 
Thus, Polysphincta carbonator is a body parasite upon three Epeiroid 
species, but is reported as a guest upon unknown spider eggs; P. rufipes 
Generali- 
zations. 
