184 Trans. Acad. Sct. of St. Louis 
spots. Thousands were taken in the net, but most of 
them escaped through the large mesh. They kept near 
to the ground and moved rapidly; they were so small 
that individuals could not be followed. Some burrows in 
the grass were plugged with the heads of the guards 
and in some the females were seen to enter. From: the 
size of those in the dance, I suspected them to be males, 
and the behavior indicated courtship. 
Little Carpenter-bee, Ceratina calcarata Rob. [J. C. 
Crawford]. 
A good many stems of the red rambler roses had been 
eut back, and each year dozens of these contained nests 
of these bees and their parasites, but in so far as I could 
see there was no relation between these bees and the 
other inhabitants of the clay bank, They went afar for 
their pollen, and neither preyed upon the others, nor 
were preyed upon; in fact, in every way they held them- 
selves aloof from their neighbors. 
The caterpillar wasp, Ancistrocerus fulvipes Saussure. 
Among the pioneers in the clay bank should be con- 
sidered the caterpillar huntress, Ancistrocerus fulvipes, 
since she almost never used the old burrows for nest- 
ing, but dug her own tunnels among those of the min- 
ing bees. 
In 1917, this species was seen about the clay bank as 
early as June 17, when three adults were out. By July 
7, this number had increased to a dozen, and by the 
16th, neither their number nor their industry had waned, 
although by this time, their companions Anthophora 
abrupta, Trypozylon clavatum and the chalcid parasite 
Monodontomerus had disappeared, either temporarily oF 
permanently for the year according to species. For sev- 
