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 Walker, E. M. 



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 1920. Orthoptera. In Report of the Canadian Arctic Expedition 1913-18, 

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 Walker, Francis 



1870. Catalogue of the specimens of Dermaptera Saltatoria in the collection 

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 Washburn, R. H. 



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 Wilbur, D. A., and Fritz, R. F. 



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 Wilson, C. C. 



1947. Control of the devastating grasshopper in California. Bull. Cali- 

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1902. Grasshoppers in California. California Agr. Exp. Sta. Bull- 142, pp. 



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 1913. Guide to California insects. 360 pp., 361 figs. 



U, S. GOVERNMENT PRINTING OFFICE: 1958 



