INSECT BEHAVIOR 363 
Very often after one thorough study of the topography of her 
home has been made, a wasp goes away a second time with 
much less circling or with none at all. The second diagram 
[Fig. 291, B] gives a fair illustration of one of these more 
hasty departures. 
‘Tf the examination of the objects about the nest makes no 
impression upon the wasp, or 1f it is not remembered, she ought 
not to be inconvenienced nor thrown off her track when weeds 
and stones are removed and the surface of the ground is 
smoothed over; but this is just what happens. Aporus fasci- 
Fic. 201. 
A 
Locality studies made by a wasp, Sphex ichnewmonea. A, a thorough study; 
a hasty study; n, nest. After PEcKHAM, from Bull. Wisconsin Geol. and Nat. te 
Survey. 
atus entirely lost her way when we broke off the leaf that 
covered her nest, but found it without trouble, when the miss- 
ing object was replaced. All the species of Cerceris were ex- 
tremely annoyed if we placed any new object near their nest- 
ing-places. Our Ammophila refused to make use of her bur- 
row after we had drawn some deep lines in the dust before it. 
The same annoyance is exhibited when there is any change 
