420 Trans. Acad. Sci. of St. Louis 
Highth cell, 
1 Zygoballus bettim [H. J. Emerton]. 
2 Phidippus sp. young. [H. J. Emerton]. 
3 Sassacus barbipes P. [C. R. Shoemaker]. 
The three nests above were opened on July 2. 
Another nest of two cells was opened on September 4, 
and gave: 
7 Misumessus asperatus Htz. [C. R. Shoemaker]. 
1 Dolmedes, perhaps idoneus [H. J. Emerton]. 
2 Dendryphantes militaris [H. J. Emerton]. 
1 Theodina puerpera young [H. J. Emerton]. 
6 Phidippus sp. [H. J. Emerton]. 
‘A glance over the names of the spiders will show the 
large variety taken, despite the fact that I have recorded 
the work of only four mothers, and yet one can see the 
tendency of the mothers to show individual preferences. 
For instance in nest 55B, of the 25 spiders collected by 
this mother, 17 were Gayenna pectorosa, and no other 
mother, even though hunting at the same time in the 
same region, had any of this species, and aside from 9 
specimens of Eypeira which occurred in other nests, the 
other species, Philodromus pernix and Xysticus gulosus 
have not been found in other nests. 
In nest 55C, of 15 spiders taken by the mother, 6 be- 
longed to the genus Dendryplantes, 4 to Phidippus and 2 
to Misumena, but this shows no individual taste since 
the same species appear in the contents of nest 55A. 
In nest 55A, 36 spiders cover a wide range of nine 
genera and about twelve species. This mother was not 
so fastidious. The most of any one kind was 9 from the 
genus Phidippus; hence I conclude that she was easily 
adaptable in her choice of spiders. 
