206 ASSOCIATION OF ECONOMIC ENTOMOLOGISTS. 



Page. 



Weather conditions, study, in forecasting abundance of insects 91 



Webwonii, fail. (See also Hyphantria cunea and Hyphantria textor.) 



observations on migrating, feeding, and nesting habits 41-51 



Webwornis. (See Crambus vulgivagellus.) 

 Weevil, New York. (See Ithycerus noveboracensis .) 

 W^eevils. (See Calandra granaria and Calandra oryza.) 



Wheat, food plant of Isosoma sp 71 



Mayetiola destructor 71, 81 



Nysius sp 69 



Toxopiera graminnin 67 



injured by rust 71 



midge. (See Contarinia trltici.) 

 White grubs. {See also Lachnosterna.) 



injury to grass in New York 90 



Willow borer. (See Cryptorhynchus lapaihi.) 



food plant of Cryptorhynchus lapathi 74 



Malac.osoma disstria 79 



Wing origin and insect phylogeny 29 



Winthemia quadripustulata, sulphur dioxide as insecticide 145 



Wood products (staves of ice-cream freezers), injury by Dermestes vulpinus 76 



Woolly aphis. {See Aphis, woolly, and Schizoneura lanigera.) 

 currant. {Sse Schizoneura fodiens.) 

 maple-leaf aphide. (See Pemphigus acerifolii.) 

 scale. (See Phenacoccus acericola.) 



Yellow fever, and other insect-borne diseases, symposium 28 



Federal control 101 , 102, 105 



in Connecticut in 1794, probable origin 24 



mosquito. (See also Stegomyia calopus.) 



resolution praying Federal extermination 102 



sulphur dioxide in control 150 



Yucca Jilamentosa , fertilization 18 



