Field Studies of the Non-Social Wasps 417 
by partitioning off the remainder of the tunnel. The 
outer surface of all the partitions was very smooth, while 
the inner surface, the side which was away from the 
wasp as she worked, showed each load of mud clearly 
distinguishable in little ridges. The entire burrow was 
about 4 inches in length and 5/16 inch in diameter. The 
cells were opened, of course, in the inverse order to that 
in which they had been made and filled. The first emp- 
tied (the last sealed) contained eleven spiders, of several 
Species, and an egg on the last one brought in. Not one 
of the spiders seemed to be alive. The next cell had nine 
spiders and a small dead 7. clavatum larva. The next, 
the third from the top, had eight spiders and a larva 
one-fourth grown. The fourth contained four whole 
Spiders and parts of as many more, and a T. clavatum 
larva one-third grown. The fifth cell had only three spi- 
ders remaining and a large larva; the sixth cell con- 
tained ten spiders but no egg or larva. The seventh cell 
harbored a larva more than half grown and only one re- 
maining spider, while the eighth cell was sealed with 
only six spiders and no egg. 
This was no simple task for so small a wasp to ac- 
complish—the preparation of eight cells for her nest 
and provisioning them with approximately seventy spi- 
ders. The task may be easier, or on the other hand it 
may be more difficult, because of her habit of gathering 
not one species only, but a great variety of spiders. If 
She hunts them merely by prowling and blundering 
about, then it is of great advantage to her that she can 
use a variety of prey. If her habits or instincts were re- 
fined enough to lead her to go again and again to the 
peculiar habitat of some species, as some wasps do, then 
much of her rambling and hunting would be saved. Thus 
in the wasp, as in the human species, it remains a ques- 
