Notes on Behavior of Bees 223 
these populations was occupied and the clay bank had been en- 
tirely destroye 
n their foraging expeditions, this bee sometimes falls prey 
to spiders. One bee was seen emmeshed in the web of the orb- 
weaving spider J/iranda sp. and on July 6, 1930, I was attracted 
to the clay bank by the “squeaky” sound of this bee and found 
a female struggling in the grasp of a jumping spider, Phidippus 
audax-tripunctatus Hentz. 
Augochlora (Oxystoglossa) pura (Say) [S. A. ee 
A half dozen cells of ae ips was taken from under 
from these cells from June 8 to 
Halictus provancheri (D. T.) 
A dozen bees were observed going to flowers of the oe 
sour grass (Oxalis stricta) at Wickes, Mo., May 24, 1931 
Halictus (Chloralictus) sp. 
A large colony of these bees was found making horizontal 
nests in a slight elevation of earth that was thickly matted with 
fine roots. There were about 25 such nests and a good many 
out of each nest. The door rway of each nest had a guard whose 
head snugly fitted the opening. The tunnel was larger than 
the door-way and permitted the guard to back down so that 
an incoming bee could pass over its body nob the depths of 
the nest. On June 29, 1930, I saw an incoming pollen-laden 
Siatnes chase away a parasitic wasp, Pseudomocthoca canadensis 
ae that was at Sa near her door-way, and in digging open 
nest later in the -, I found another parasite Brachycistis 
Henin: Fox in the tunnel. 
Halictus ligatus (Say) 
Many bees were taken from the flowers of black-eyed Susan, 
Rudbec ce hirta. at Glencoe, Mo., June 15, 1930. 
Halictus illinoensis (Robt.) 
Several specimens were taken as they were feeding on the 
flowers of the flea-bane, Erigeron sp., at Ranken, Mo., June 13, 
1930, 
Bombus americanorum (Fab.) 
This bumble-bee, a ground-nesting species, sometimes trans- 
gresses from its normal behavior, and founds colonies in such 
unusual places as a hanging paint bucket, a sack of straw on 
a cabin floor, a box of carpet rags and other such places as 
