308 Trans. Acad, Sci. of St. Louis 
of the many holes empty-handed. With a probe I found 
the hole so shallow that the spider was easily poked out. 
It was legless; the legs had all been bitten off very near 
to the body. This is my first record of a totally de- 
legged spider. The victim, a Pisaurina wndata Htz. 
[C. H. Shoemaker], was evidently dead. For the next 
half hour she continued to entertain herself by going 
into other abandoned holes. It is possible that this par- 
ticular wasp had a mud cell hidden in one of the bee- 
burrows and, becoming confused at not finding the right 
cell, abandoned the prey. 
P. mellipes, too, has her enemies. In September, 1919, 
a cuckoo-bee, Tetrachrysis pattoni Aaron [S. A. Rohwer], 
was reared from one of its cocoons. 
A brief summary of the nesting habits of the mem- 
bers of this genus, as far as they have been reported, 
might be of interest here in a comparative way, although 
finer details of the methods of manipulation are needed 
before we can get much from a study of their relation- 
ships through this behavior. 
The pots of Agenia punctum* are made of mud and 
are shaped like oval jars, each smaller than a cherry 
stone. Those of A. hyalipennis affect a conoid form, 
narrow at the base and wider at the mouth like a primi- 
tive drinking cup. The nests of both species are glazed 
on the inner surface; this makes them waterproof. 
(Fabre, The Mason Wasp, p. 84, and Sharp, Insects, Pt. 
2, pp. 105-106.) 
Agenia carbonaria contrives a nest much like a wide- 
mouth bottle. It appears that this insect has not learned 
*Many of these insects were formerly known under the generic 
name of Agenia, but since the name was preoccupied in the Hemiptera, 
he genus is now named Pseudagenia (Banks, Journ. N. Y. Ent. Soe 
19:221, 1911). No attempt is made in these reviews to standardize the 
nomenclature, but each name is the one used by the author cited. 
