248 ENTOMOLOGICAL NEWS. [June, ’12 
Family CRABRONIDAE 
Trypoxylon texense Sauss. (Pl. XVI; fig. 5). 
This was found to be a rather common insect in Cheyenne 
County, frequenting the clayey banks where they made use of 
deserted bee tunnels for their nidi. Some of these holes were 
probably those made by the bee Melitoma grisella, which occur- 
red in this locality. One burrow dug out was about five inches 
long, nearly horizontal and terminating in a smooth somewhat 
inclined cell packed with nine little spiders. 
In Greeley County we found this wasp using tunnels made 
by the large bee, Anthophila occidentalis. From one burrow 
containing three cells we took fifty-one small spidefs. Texrense 
sometimes makes use of the cell of Anthophora and again they 
will stop up the tunnel a little and enlarge it locally to suit their 
own fancies. 
The nine spiders taken from our cell of a Trypoxylon bur- 
row, Cheyenne County, were as follows: Rucinia aleatorea, 
Argiope trifasciata, Xysticus cunctator.* The fifty-one 
spiders taken from three cells of a Trypoxylon burrow, Gree- 
ley County, were: Philodromoides pratariae, Argiope trifas- 
ciata, Metepeira labyrinthea, Misumena americana, Dendry- 
phantes octavus, Phidippus texanus, thus representing eight 
genera and eight species. 
Crabro interruptus St. Farg. 
We shall soon see how the Pyralid, Loxostege sticticalis 
Linn., is destroyed in its larval stage by Odynerus annulatus. 
Observations along the Sappa Creek, near the town of Oberlin, 
Decatur County, have shown that the adult moth also falls a 
prey to a species of wasp (Crabro interruptus), which stores 
its nest with them. 
On July 19th, 1910, a box-elder stump (Acer negundo) 
showing the work of some sort of borers was sliced off until a 
number of more or less vertical tunnels was revealed in the 
decaying wood. Some of these at least seemed to be the work 
of one of the Uroceridae, a larva of which was dug out. Other 
*Determined by Nathan Banks, of the U. S. National Museum. 
