Field Studies of the Non-Social Wasps 423 
The prey of the fourth individual gives us more infor- 
mation; Misumessus asperatus probably has flower-fre- 
quenting habits, as has its near relative, Misuwmena; Dol- 
medes idoneus is a member of the genus of which Com- 
stock says, they are most often observed near water or 
in marshy places, but sometimes they are found in cellars 
or other dark and dry situations. Of Dendryphantes 
muitaris, we know nothing excepting that it is a very 
common species. For the last spider, Theodina puerpera, 
no biological data were found. 
From a survey of their prey, one concludes that the 
most of their hunting is out amid the vegetation and oc- 
casionally on bark. None of the turret-building or 
ground-inhabiting or house-frequenting spiders are 
among the prey. 
Four times I have taken nests of Polistes pallipes, and 
found the empty cells used by 7. clavatum and resealed 
with mud (fig. 56). During the past few years I have 
examined hundreds of nests of paper wasps, and have 
found only these four cases, and all in the same frame 
building. Here, too, in closing the nest an air-space was 
made similar to those shown in fig. 55. This fondness of 
IT’. clavatum for the nests of Polistes seems to be of a 
strictly local character since I have nowhere else found 
the paper nests reused by this wasp. The fig. 56 shows 
19 cells plugged with mud by 7. clavatum, and the arrows 
point to 3 cells used by the bee Osmia cordata and sealed 
with a waxy substance. Since we find certain idiosyn- 
eracies of a local character, may not the law of heredity 
after all be a factor in perpetuating new habits? 
Trypoxylon albopilosum Fox. [S. A. Rohwer]. 
Although the clay bank was studied frequently during 
the early summer, no members of this species were seen 
