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of the victim’s thorax. Early next morning it almost completely 
encircled, like a tall collar, its unfortunate victim, but on the 
following morning, August 9, there remained the full-fed glassy 
white wasp grub and only a couple of horny pieces of its former 
prey—all else had been consumed in the final great spurt of the 
grub’s voracity. The Larra grub is about 14 mm. long, medium 
stout, with a moderate- sized head; lateral fold rather well 
marked and, as is usual in Larrids, tuberculate on the thorax. 
On the middle line of the underside of the twelfth segment is a 
small, rather low tubercle. The larva now began forming a 
cocoon, and as the former was placed in a vial partly filled with 
moist and loose soil, the process was easy to follow, and resembied 
that in the genus Notogonidea. The larva first supported itself 
by a few silken threads and then commenced the cocoon proper, 
forming a wet and agglutinized soil girdle or band about its 
middle, and from which numerous silken stays now radiated. She 
augmented this band on both borders until completely encased in 
an oval cocoon. 
On September 10, or just a month after spinning, a rather 
small female Larra hatched from the cocoon. So the life-cycle 
in the one case observed was as follows: Egg stage, 4 days; 
feeding larval stage, 914 days; cocoon stage, 311% days. Total, 
45 days. 
At least the female of this species passes the night under- 
ground. One which I confined in a jelly tumbler half filled with 
soil buried herself regularly at the close of each day. 

Notogonidea williamst Rohwer. 
Length 7 mm. ; black; propodeum rather coarsely reticulate. 
This common little lowland species was frequently observed 
seeking her prey; she would walk about rapidly, peeking under 
lumps of soil, in crannies, ete., and eventually succeeded in grab- 
bing and stinging Nemobius histrio Saussure, the minute cricket 
with which she stores her burrow. Finding the latter is usually a 
matter of accident, for the prey is so much smaller than the 
wasp that it is swiftly borne away on the wing and the pair lost 
to view. 
On November 18, 1916, I found one of these burrows, with 
the proprietress filling it up with bits of soil which she carried 
and manipulated with her mandibles. The burrow was_ only 
about two inches long and opened at the edge of a leaf flattened 
down on the gravely soil; it was more or less horizontal and ter- 
minated in three roomy cells, one of which was empty; the other 
