CONTENTS. 



Page. 



Introduction 5 



Poisoning rodents 7 



Some common rodent poisons 7 



Methods of using strychnine 8 



Necessity of spring poisoning 8 



Cooperation , 9 



Columbian ground squirrels 10 



Distribution 10 



As tick hosts 10 



Hibernation and breeding 11 



Food habits 11 



Injury to crops 12 



Poisoning 14 



Formula I. Poisoned groats 14 



Formula II. Poisoned biscuits 15 



Putting out the poison 15 



Trapping . 16 



Methods of setting traps 16 



Fumigation 19 



Conclusions 20 



Chipmunks 20 



Distribution 20 



As tick hosts 20 



Injury to crops 22 



Poisoning 22 



Formula III. Flour-coated wheat 23 



Formula IV. Waterproof wheat poison 23 



Other methods of destroying chipmunks 23 



Conclusions 24 



Side-striped ground squirrels 24 



As tick hosts 24 



Injury to crops 25 



Habits. 25 



Poisoning 25 



Pine squirrels 26 



Injury to crops 26 



As tick hosts 27 



Destruction 27 



Woodchucks 27 



Distribution ; 27 



Hibernation, breeding, and food 28 



Injury to crops 28 



As tick hosts 28 



Poisoning 28 



Trapping... 29 



White-footed mice 29 



Distribution and habits 29 



Poisoning 30 



House mice ' 30 



Wood rats 31 



As tick hosts 31 



Destroying 31 



Meadow mice 32 



Distribution and habits 32 



Injury to crops 32 



Poisoning 34 



Formula V. Green alfalfa 34 



Formula VI. Alfalfa hay 36 



484 3 



