49 
much the same, have not been severely damaged by the native locusts, 
as has been the case in the latter region. The explanation, it seems, 
lies in the more thorough system of cultivation and in the practice of 
cutting the grass along the irrigating ditches, though probably several 
other factors have combined to bring about the result. 
IDAHO. 
Specimens of the Rocky Mountain locust were captured at Pocatello 
and at American [*alls. Im the table-lands west of Pocatello and to 
the left of the Port Neuf River numerous specimens of spretus, which 
had bred in the valley, were found collected and preparing to migrate. 
A strip about one-half mile wide by nearly a mile long was practi- 
cally covered with them. The 1st day of September, the wind having 
been unfavorable for several days, but having now changed, they arose 
and, collecting in a rather compact mass, disappeared in a northeasterly 
direction. After they had left, where thousands had been seen before not 
one was to be found. Search was made for eggs, but none were found; 
nor were any females seen in the act of depositing them. The only 
subsequent trace of this swarm that I have been able to find was con- 
veyed in the information given me by a ranchman who came from near 
Eagle Rock. He stated that on the same day (September 1) he had 
seen a swarm of locusts a few miles north of Blackfoot, passing to the 
northeast. Probably the destination of this swarm was the head- 
waters of the Snake River, in northwestern Wyoming. They caused 
no damage in the vicinity of their starting point, for it was not an agri- 
cultural or a grazing country, and it is not probable that they reached 
a country in which they could do much damage. It is altogether likely 
that this swarm, which was the only one at all of formidable proportions, 
will be heard of next year, though its present whereabouts is not known. 
The native species have not been much in evidence; the only case of 
damage was reported from near Nampa, and was caused to young prune 
trees by Acridiwm shoshone. They had been damaged, it was said, to 
the extent of several hundred dollars. 
At various times information as to hordes of western crickets (Ana- 
brus) was reported to me while passing through this region. They had 
reference in most cases to inaccessible regions, and were not in many 
cases to be relied upon. One of these reports came from Hailey, but I 
have received information of a rather contrary character from the resi- 
- dents. Another report of the same nature came from Challis. 
OREGON AND WASHINGTON, 
These States were not included directly in my letter of instructions, 
but reports of damage in accessible points led me to visit certain local- 
ities in the eastern portion of them. From reports given me by resi- 
dents, it appears that for the last three years the wheat growers, 
especially in Wasco, Umatilla, Union, and Baker counties in Oregon, and 
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