HUNTERS OF LARGE ORTHOPTERA 171 



day moved its legs and antennae only upon stimulation. By 

 the forenoon of the following day, it had recovered enough 

 vigor to move spontaneously, but the powers lasted for only 

 this one day, when they again waned. During the next two 



FIG. 39. Two burrows of Priononyx atratum. Natural size. 



or three days, it moved in response to stimulation and voided 

 excrement, but gradually grew more sluggish until, one week 

 later, it was dead. 



In four instances, we found a P. atratum nest well covered, 

 and the hopper within being speedily consumed by Dipterous 

 larvae. These parasites destroy the egg as well as the lo- 

 cust, and since they seek to enter the body of the hopper at 

 its softest point, i.e., where the wasp egg or larva is attached, 

 the egg is usually destroyed before it has a chance to hatch. 



