INSECTS, AND THEIR RELATION TO MAN 193 



Webster, F. M., "The Hessian Fly. 1 ' Circular 70, U. S. Department 

 of Agriculture, 1906. 



Howard and Marlatt, "Principal Household Insects of the United 

 States." Bulletin 4, U. S. Bureau of Entomology, 1902. 



Many authors, "Insect Pests and Plant Diseases." Bulletin 252, 

 Cornell University Agricultural Experimental Station, 1908. 



Sanderson, E. D., u Winter Work against Insects." Garden Maga- 

 zine^ November, 1906. 



Howard, L. O., " The Economic Status of Insects as a Class." Annual 

 Report of Smithsonian Institution, 1908. 



Felt, "Control of Household Insects." Bulletin 129, N. Y. State 

 Museum, Albany, 1909. 



Chittenden, F. H., " Some Insects Injurious to Garden and Orchard 

 Crops." Bulletin 19, U. S. Department of Agriculture, 1899. 



Howard, L. 0., " The Principal Injurious Insects of the Year 1907." 

 Bureau of Entomology, September, 472, Yearbook, 1907. 



Felt, E. P., "Catalogue of Some of the More Injurious and Beneficial 

 Insects of New York State." Bulletin N. Y. State Museum, No. 37, Vol. 

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Howard L. O., "Three Insect Enemies of Shade Trees." Farmers' 

 Bulletin 99, U. S. Department of Agriculture. 



Slingerland, M. V., " Two New Shade Tree Pests." Bulletin 233, Cor- 

 nell Experimental Station, 1905. 



" The San Jose" scale." Country Life in America. March, 1906. 



Smith, John. B., " Insects and Entomologists : Their Relation to the 

 Community at Large." Popular Science Monthly, March, 1910. 



Webster, "The Value of Insect Parasitism to the American Farmer." 

 Yearbook U. S. Department of Agriculture, 1907. 



Van Norman, L. E., "Fighting Insect Enemies of Our Crops." Re- 

 view of Reviews, June, 1908. 



Marlatt, "Annual Loss occasioned by Insects iri the United States." 

 U. S. Department of Agriculture. 



Chittenden, F. H., "Some Insects Injurious to Orchard and Garden 

 Crops." Bulletin 19, U. S. Department of Agriculture. 



' Mexican Cotton-boll Weevil .' ' Entomology Circular 60, U. S. Depart- 

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Chittenden, F. H., "The Imported Cabbage Worm." Entomology 

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Hale, " The San Jose" Scale." Country Life in America, March, 1910. 



Ward, H. B., " Insects and Disease." Western Medical Review, 1908. 



Webster, " The Western Grass Stem Sawfly." Circular 117, U. S. De- 

 partment of Agriculture, 1910. 



SHARPE'S LAB. MAN. 13 



