2!J 
to trust too implicitly in them. The settlers must themselves take a 
hand in the fight if they would be sure of victory. As shrewd as are 
most of the living things about us, man is shrewder still. Hence, if he 
undertakes in earnest the task of outwitting any of these lower forms 
of life, he is bound to succeed. True, there are often many difficulties, 
apparent or real, to be overcome, but a little judicious planning in the 
end brings success. 
The habits, life-history, and haunts of the Pellucid-winged Locust 
differ materially from those of the Rocky Mountain or True Migratory 
one which has received so much of our attention during the past twenty 
years, and which has finally been obliged to yield the ground to us on 
account of the mode of warfare adopted. Still, the characteristics of 
Ca ninula pellucida are essentially similar, and slight modifications in 
the mode of warfare as used against the former insect will be success- 
ful with the latter. The use of the "kerosene pans" or hopper-dozers 
is quite practicable in most cases against the pest upon the valleys, 
while plowing for the destruction of the eggs before hatching can be 
resorted to in a number of instances, both upon rolling and level ground. 
All this requires work. So does the destruction and keeping down of 
noxious weeds. 
While matters begin to look more hopeful with reference to the Pellucid 
Locust, upon Camas Prairie at least, I am sorry to be obliged to report 
that there seems to be a decided increase among several other species 
of these insects now in the region. Of these latter there are the Lc - 
Migratory Locust (Melanoplus atlanis), the Detestable Locust | M.fwdus , 
the Two-striped Locust (M. bivittatus), and Pezotettix enigma, for which 
there is no common name. All four of these locusts were quite plenti- 
ful at various points upon the prairie, and especially so in the vicinity 
of the foot-hills on the north side. In certain localities they were suffi- 
ciently numerous to materially injure the grasses and other natural 
vegetation, and at a few points even did noticeable injury to cultivated 
crops that had escaped the ravages of Camnula pellucida earlier in the 
season. Of course the undue multiplication of these various other locusts 
is caused by the same favoring conditions which allowed the pellucida to 
develop in such overwhelming numbers. Whether or not. since most 
of the swarm of that one has left the valley, these latter will be attacked 
by the great numbers of enemies which its presence permitted to de- 
velop and which it left behind, remains to be seen. 
THE DESTRUCTIVE WESTERN CRICKETS. 
While not exactly locusts, these large wingless insects which are 
usually known by the name of Western Crickets need mention in this 
connection. A number of years ago, during the days of geological sur- 
vey expeditions, and when the first fieldwork of the United States En- 
tomological Commission was being done, these insects were frequently 
seen in immense droves moving over the country like so many sheep. 
