THE DECTICINJ^ OF NORTH AMERICA— CAUDELL. 



365 



males are bordered behind and on the sides with the same color. The 

 under side of the body is licrht in color and the legs are often j^ellowish 

 brown, the outer face of the posterior femora often spotted or mottled 

 with black and 3'ellowish brown. 



2Ieasureinenfs. — Length, pronotum, male, 7.5-9.5 mm., female, 

 7.5-10.5; posterior femora, male, 14.5-18, female, 15-19; o\dpositor, 

 20-24. 



22//>6.— Cat. No. 1108, U. S. National Museum. 



Sjjeclmens examined. — The male and fenjalc types from Montana, 

 and specimens from the following localities in Washington: Baird 

 (May), Coulee City, May 30 (Piper), and Blue Mountain, July 15. 



This species is ver}^ nearly allied in general appearance as well as 

 habits to Anahrus sirnple.r. Like that species it often occurs in vast 

 numV)ers, devastating cultivated crops. Such occurrences, however, 



Fig. 52. — Peran"abeu.s pcabricollis. adult female (after Snodgra.ss). 



have so far been reported only in the State of Washington. The same 

 remedies apply to it as in the case of invasions by Analrus. The inter- 

 nal anatomy of this insect is given by Mr. Snodgrass, as is also the 

 habits and life history. The following notes are mostly taken from 

 the articles of this writer: 



The common name of "Coulee cricket" is often applied to this 

 insect, suggested by the insect's partiality to regions in or about can- 

 yons known b}^ that name. They seem to breed in desert lands, but 

 often migrate into cultivated areas, there doing much damage. By 

 the first of June most have reached the adult stage. When not migrat- 

 ing they move about or sit motionless under bushes. Their usual 

 gait is a slow walk, but when frightened they will jump. They ordi- 

 narily walk at a rate of about ten feet a minute. When they leap 

 they cover a distance of from three to four inches at a jump. They 



