106 
has the antennae and one or two basal abdominal spots of the 
same orange color. 
On two occasions I saw this wasp capture her prey, and on the 
first of these the performance on the part of the huntress was 
somewhat remarkable. During the latter part of August, 1916, 
I noticed one of these wasps hunting excitedly in a small garden 
plot at the College of Agriculture. The area had a few small 
bushes about its center and was bordered by a small ornamental 
plant, “Cucharitas” (Alternanthera 
versicolor Regel). To this Cuchar- 
itas border the wasp presently flew 
and, searching about, soon located a 
double spider thread, the two strands 
being quite close together and _per- 
haps uniting further on, leading 
from this low border to a_ bush 
about four feet away and secured 
thereto, at a height of a tittle less 
than three feet from the ground, by 
several guy-threads. Batozonus was | 
at first able to walk along this double Fig. 51. Cell of Pseudagenia 
aegina suspended from a 
rope, but farther along ran and flew jy ootlet. Natural size. 
rapidly over the single part, selected 
the correct guy-rope and thus located her prey in the bush. The 
spider did not question the wasp’s motives, but dropped to the 
ground, crawled up the bush, and repeated this performance in 
an effort to escape. The poor arachnid, however, fat and stiff- 
bodied, was not of those swift species which frequently evade 
their would-be wasp captors, and so in a short time she was over- 
hauled and effectively stung. Then the victorious wasp appar- 
ently fed for a while on the mouth-juices of her prey, but sud- 
denly noticing a stream of small dark ants passing nearby, low- 
ered her antennae in consternation and seemingly upon the 
nearest ants, and then grabbing her very large prize, she dragged 
it away to place it three-quarters of an inch or so upon a tuft of 
grass. The spider was eventually borne away and interred. 
On August 9, 1917, while on a hillside, I brushed a large- 
bodied spider off my person and then noticed that one of these 
yellow-winged wasps was searching the ground about my feet. 
She soon located this spider, which being rather clumsy hardly 
served to intimidate her, and so after a struggle she grasped and 
climbed upon the dorsum, and with her head towards the caudal 
end of the spider, stung it in the region of the chelae or jaws and 
immediately stopped its activity. "Then seizing the spider with 
her mandibles by the base of one of the forelegs, she backed 

