VERTEBRATES 153 



4. Pocket gophers and their economic relations. 



5. Species of mice. Their habits. 



6. The dancing mouse. 



7. Damage by mice. Plagues of field mice in Nevada. 

 Method of extermination. 



8. Habits and kinds of rats. 



9. Economic importance of rats. Methods of extermi- 

 nation. 



10. Rats and the bubonic plague. 



11. Squirrels, kinds and habits. 



12. The economic value of rabbits. 



13. The groundhog myth. Habits of woodchucks. 



14. The beaver — their habits and sagacity. Methods 

 of trapping them. 



15. Prairie dogs — their habits and economic impor- 

 tance. How exterminated .' 



16. What are porcupines.' 



17. Variation in the homes among rodents. Usual 

 means of defense. 



18. Make a hst of rodents in a column, and in another 

 column opposite each name write the various ways the 

 animal is of economic importance. Sum up with a state- 

 ment showing the most important ways rodents are of 

 value to man and harmful to man. 



19. Defend the proposition that rodents are on the 

 whole harmful animals and should be exterminated. 



20. How some rodents contribute to the science of 

 medicine, more especially to bacteriology. 



The Cat or Dog — Carnivora 

 Materials. 



Living specimens of cats or dogs. Pictures, books, 

 lantern slides, etc. Supplement the laboratory study with 



