BEPOET OK DESTRUCTIVE LOCUSTS. 
By Lawrence Bruxer, Special Agent. 
LETTER OF SUBMITTAL. 
Lincoln, Nebk., Octoler S, 1891. 
Sir : I beg to submit herewith a report of my observations on the destructive lo- 
custs of the country during the current year, a work which has engaged, as you 
already know, the greater portion of my time during the past summer. While oc- 
cupied with these investigations portions of Colorado, Wyoming, the Dakotas, Min- 
nesota, Montana, Idaho, and Utah, along with the Eed River Valley of Manitoba, 
were visited by me. In addition to the regions personally examined, I am also ena- 
bled to include reports on other districts based upon reports and specimens obtained 
from friends who themselves had examined into the conditions of these affairs. 
It will not seem surprising, therefore, if the greater portion of my report relates to 
this particular group of insects. Since there have been a number of species of these 
destructive locusts concerned in the injuries inflicted in various portions of the 
country during the season, I have thought it best not only to mention all of these, 
but also to include such others as have been recorded as pests during former years, 
as well as those that are liable in the future to become injurious over local areas. 
This report can then serve as a sort of reference hereafter for those wishing to study 
the injurious insects of this class found in America north of Mexico. 
It is but just here to acknowledge the aid which I have received from various rail- 
road companies that took sufficient interest in the locust question to grant it, in the 
shape of transportation by which I was enabled to visit many regions that would not 
otherwise have been reached. I would also extend my thanks to all those persons 
who have aided me in any manner whatsoever during the summer's work among the 
destructive locusts. 
The regions visited by myself and other agents of the Division early in the season, 
as well as those examined by Messrs. Snow and Popenoe, of Kansas, have been re- 
ported upon heretofore; hence will not be treated at length here. The district com- 
prised in North Dakota and Minnesota, over which the true Migratory or Rooky 
Mountain Locust was more or less abundant, has been carefully studied during the 
year by Prof. C. B. Waldron in the former and Prof. Otto Lugger in the latter Slate. 
The reports of these gentlemen are appended hereto. 
Very respectfully yours, 
Lawrence Brunjul 
Prof. C. V. Kiley, 
U. S. Entomologist. 
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