LETTER OF SUBMITTAL. 
Lincoln, Nebb., October 20, 1892. 
Sir: Since there has been an apparent increase in the number of cer- 
tain of the destructive locusts in many parts of the country during the 
past two or three years, it has been deemed advisable to prepare a 
I brief account of all of the species that have been connected with these 
depredations. The following pages on the Destructive Locusts of Amer- 
ica Xorth of Mexico are therefore submitted for approval and for publica- 
tion, if thought worthy. As will be seen, this paper covers all of the 
forms that have been the cause of injury in the past, as well as those 
that are liable to do injury in the future. 
The manuscript which forms this paper was originally prepared as a 
part of another report,* but at your suggestion has been somewhat re- 
arranged so as to make a separate bulletin, if thought desirable. The 
excuse for offering this paper at the present time is that, although all 
of the insects herein mentioned have been previously described, the 
literature in which the descriptions originally appeared is so scattered 
and difficult of access that the general reader would have trouble in 
refer ring to it. Besides, many of these works are now out of print. 
Then, too, a paper treating of the entire group of these destructive 
insects of the region included is in demand by both the working ento- 
inologists and the general reader. The short sketches relative to the 
food habits and distribution of each of the species treated have been 
compiled from previous writings and field notes gathered by the various 
agentsof the United States Entomological Commission and the Division 
of Entomology, and are supposed to be approximately correct, at least as 
nearly so as could be made at present, while the life histories are chiefly 
from your own notes and observations. 
Through your kindness and interest in the undertaking a number of 
the forms are herewith figured for the first time. Other courtesies are 
also gratefully acknowledged. 
Prof. C. V. Kiley, 
T. 8, Entomologist, 
Washington, P. C. 
Lawkence Bbuneb, 
Special Fit Id Agi nt. 
" Reports on tin- Damage by Destructive Locusts daring the season of 1891, Hull. 
No. 27, of I', s. Department of Agriculture, l>i\ ision of Entomology, pp. 9 
7 
