248 ENTOMOLOGICAL NEWS. [June, 'l2 



Family CRABRONIDAE 

 Trypoxylon texense Sauss. (PI. 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 spiders. Texense 

 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- 

 data, Metepeira labyrinthea, Misumena americana, Dendry- 

 phantes octavus, Phidippus t ex anus, 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 Odynents annnlatus. 

 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 I9th, 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. 



