The Western Cricket. 
i5 
years, which would throw their existence back to the brood of 
1895. Observations by ranchmen are intermittant and occasional. 
The country is extensive and seldom visited by the people in every 
locality. Owing to the gregarious habits of the pest, it is quite 
possible that small bands could exist in the hills for years without 
being observed. In any case, the migrations of 1900 and 1902 
must have been an important factor in overpopulating the breeding 
grounds. 
The spring of 1904 opened very early, and in the first part of 
summer the hordes began to come down among the ranches from the 
Hayden divide. Judging from the directions in which the broods 
traveled, eggs must have been deposited the previous year over a 
large proportion of the range. 
At Hayden the insects appeared about the first of June, travel¬ 
ing east and northeast. On reaching the ditch between the hills 
and cultivated fields, they leaped into it and crossed. Many dead 
and living floated down the ditch, where they lodged against a dam, 
making a mass forty feet long, one foot deep and perhaps four feet 
wide. 
The chief injuries were to potatoes, alfalfa and young clover. 
No remedies were effective. Coal oil was permitted to drip from 
the bottom of a can into the ditch. This, floating over the surface 
of the water, did good service, but the price of coal oil in this lo¬ 
cality is so high that the remedy is an expensive one. 
The army traveled on until it came into contact with a bend 
in the Bear river, when it was deflected from its course, and, follow¬ 
ing the current of water, visited Hayden a second time a few weeks 
later. At the time of our visit, during the latter part of July, the 
adults were to be found in considerable numbers in the hills south 
of Hayden, where they were ovipositing. Search was made for 
eggs, but they did not appear to be abundant. 
Swarms, coming apparently from the eastern end of the divide, 
invaded the country toward Eddy and Steamboat Springs. There 
seems to have been several divisions of this migration. At Dunk- 
ley, Mr. Yoast herded them off his crops for weeks, after which 
they seemed to retire to the Hayden divide, which is contiguous to 
this place. An immense swarm reached Eddy and located in the 
hills at that place, where eggs were laid in greater abundance than 
was noted at any other locality. 
Still another band, taking a northeasterly direction, made its 
way to within a few miles of Steamboat Springs. 
A very large band entered the valley of the William’s Fork 
and followed it, traveling west to Pagoda, at which place it was 
within twelve miles of the spot where the original migrants crossed 
the fork at Hamilton. The numbers were so great that they were 
piled in the road several inches deep. Numbers died in the ditches, 
