CONTENTS. 
Page. 
Letter of submittal 5 
Introduction 7 
The Eocky Mountain Locust 9 
Range of species 9 
Destructive appearances 10 
Life history and habits 10 
Where the eggs are laid 10 
Manner in which the eggs are laid 12 
Philosophy of the egg-mass 13 
Number of egg-masses laid by a single female 14 
The hatching process lo 
Where and under what conditions of soil the young hatch most freely. 18 
Time of hatching 18 
Habits of the young or unfledged locusts in the temporary region l'J 
Directions in which the young locusts travel 21 
Eate at which the young travel 22 
They reach, in the temporary region, but a few miles east of where 
they hatch 22 
Eate at which locust swarms move 23 
Direction of invading swarms 24 
Time of appearance of invading swarms 25 
Number of broods; peculiarities of habit. 
'io 
Hibernation 26 
The Lesser Migratory locust 26 
Eauge of species - 26 
Destructive appearances 27 
Life history and habits 27 
The Non-Migratory Eed-legged Locust 27 
Eange of the species 27 
Destructive appearances 28 
Life history and habits .-. 28 
The California Devastating Locust 28 
Eange of the species 28 
Destructive appearances 29 
Life history and habits . . 30 
The Differential Locust 30 
Eange of the species 30 
Destructive ai>pearanccs 30 
Life history and habits 31 
The Two-striped Locust 31 
Eange of species 31 
Destructive appearances 31 
Life history and habits 32 
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