192 INSECTS, AND THEIR RELATION TO MAN 



4. Name some insects that make trouble for the house- 

 keeper. 



5. Name some insects that injure the foliage. 



6. What damage is annually done the wheat crop by the 

 chinch bug ? 



7. Name some insects that make trouble for the farmer. 



8. Name five different ways that insects are useful to man. 

 with an example of each. 



9. Name some insects that make trouble for the horticul- 

 turist. 



10. Name five different ways insects are harmful to man, 

 with examples of each. 



11. What damage is annually done by the locust in time of 

 plague ? By the Hessian fly ? 



12. What are the chief enemies of insects that hinder their 

 becoming a plague ? 



References 



Hunter, Essentials of Biology. Chap. XX. 



Elements of Biology. Chap. XIX. 



Wilkinson, Practical Agriculture. Chap. XXVIII. 



Smith, John B., Our Insect Enemies and Friends. 



"Our Imported Pests." Outing Magazine, April, 1005. 



Powell, E. P., "The Battle with the Bugs." Outing Magazine, May, 

 1909. 



Adams, S. Hopkins, "Warring on Injurious Insects." American 

 Magazine, July, 1910. 



Cragin, Belle S. , Our Insect Friends and Foes. 



Hodge, Nature Study and Life. 



Howard, L. O., " How Insects affect Health in the Rural Districts." 

 Farmers' Bulletin 155, U. S. Department of Agriculture, 1908. 



Howard, L. O., " Economic Loss to the United States through Insects 

 that carry Disease." Bulletin 78, Bureau of Entomology, U. S. Depart- 

 ment of Agriculture, 1909. 



Marlatt, C. L., "Cockroaches." Circular 51, U. S. Department of 

 Agriculture. 



Howard, L. 0., "The Gypsy Moth in America." Bulletin 11, New 

 Series, U. S. Department of Agriculture, 1897. 



"Gypsy Moth," National Geographical Magazine, August, 1906. 



