186 Trans, Acad. Sct. of St. Louis 
visit just a month later showed a partial return of the 
population. 
No notes were made for 1919. In 1920, as already 
stated, May 27, found these wasps already alive. Their 
activity continued throughout June and the most of 
July. I was unable to visit the grounds then, at the 
date when the depletion of the first generation was ex- 
pected, but on September 2, A. fulvipes were more 
abundant than ever; 13 individuals were seen at one - 
time, the greatest number yet seen at work simultane- 
ously, which indicated that they were on the increase. 
None were in evidence on October 3. 
These notes, while not based on large numbers, are 
probably sufficient to show an increase in numbers, an 
earlier date of emerging when the weather is warmer 
as with the other inhabitants of the bank, and a strong 
indication of two generations a year. 
These wasps, like the mining bees, went elsewhere 
than the bank for the food for their young and them- 
selves; hence the relation that this species had to the 
community as a whole was in bequeathing their discarded 
tunnels to the other inhabitants who might want them, 
and in occasionally falling prey to other insects. One 
such instance was observed on June 28, 1920, when a 
bug, Reduvius personatus L. (W. L. McAtee), which was 
amply protected in coloration by having its sticky body 
covered with dust, and which was half concealed in a 
crevice, was found feeding upon this wasp. 
This eumenid was elsewhere seen to nest in tunnels 
in logs; for an account of its life history, see ‘‘ Wasp 
Studies Afield.’’ 
