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CONTENTS. 
Page. 
Letter of Transmittal 5 
Introduction 7 
Keport on Destructive Locusts Lawrence Brunei- . . 9 
The Locust Pest in Colorado 10 
The Locust Pest in the Red River Valley of North Dakota. Minnesota, and 
Manitoba '. 11 
Prof. Waldron's Report 13 
Introduction (by H. E. Stoclcbridge) 15 
The Rocky Mountain Locusts (by C. B. TValdron ) 16 
Migratory Locusts in Minnesota in 1891 (by Otto Lugger) 18 
The Locust Pest in Idaho— Summer of 1891 24 
The Destructive Western Crickets 29 
Locust Injuries in other Regions during the Summer of 1891 32 
Report on Locust Invasion of California in 1891 D. W. Coquillett. . 34 
Breeding Grounds of the Devastating Locust 40 
( ;tiise of the Locust Ravages 44 
Natural Enemies 46 
Remedies 51 
Report of a Trip to Kansas to investigate reported Damage from Grasshop- 
pers Herbert Osborn . . 58 
The Territory affected 61 
The Crops affected 61 
The Amount of Injury 61 
The Species doing the Damage 62 
Measures recommended . 63 
Other Species observed 64 
Parasites and Diseases ,.......», .., 64 
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