l.XXX HOST INDEX. 



Walnut — (Continued). Page 



Walnut plant louse. Chromaphis juglandicola— 83 



Walnut scale. Aspidiotus juglans-regice ITS 



Yellow-necked apple caterpillar, Datana ministra 4f>ti 



Walnut. White — see Butternut. 



Wandering Jew (Tradescantia spp.). 



Citrus mealy bug, Pseudococcus citri 12" ; ! 



Orange Tortrix, Tortrix citrana 442 



Washingtonia filifera — see California Fan Palm. 



Water Cress (Radicula {Roripa) nasturtiuni-aquatieum) . 



Striped turnip flea-beetle, Phyllotreta vittata 2S3 



Watermelon (i'itrullus vulgaris). 



Black scale, Saissetia olem 154 



Destructive Eleodes, Eleodes omissa borcalis 291 



Greenhouse white fly, Asterochiton vaporariorum 19S 



Lesser migratory grasshopper, Mclanoplus atlanis 43 



Melon aphis. Aphis gossypii 90 



Melon worm, Diaphania hyalinata 431 



Obscure 12-spotted cucumber beetle, Diabrotica 12-punctata tenella 273 



Pale-striped flea-beetle, Systena blanda 286 



Potato flea-beetle, Epitrix cucumeris 261 



Squash-vine borer, Melittia satyriniformis 430 



Twelve-spotted cucumber beetle, Diabrotica 12-punctata 272 



Two-spotted mite, Tetranychus telarius 17 



Western-striped cucumber beetle, Diabrotica trivittata 274 



Western 12-spotted cucumber beetle, Diabrotica soror 271 



White-lined sphinx, Celerio lineata 384 



Yellow bear caterpillar, Diacrisia virginica 390 



Yellow-striped armyworm, Prodcnia prmf.ca 402 



Wheat (Tritivum sativum). 



Angoumois grain moth, Sitotroga cerealella 450 



Armyworm, Cirphis iinipuncta 396 



Black plant-bug, Irbisia brachycerus 213 



Chinch bug, Blissus leucopterus 208 



Devastating grasshopper. Melanophts devastator 45 



Granary weevil. Calandra granaria 307 



Hessian fly, Phytophaga destructor 322 



Lesser black plant-bug, Irbisia sericans 214 



Oat aphis, Aphis avenw 87 



Pacific plant-bug, ThyriUus pacificus 215 



Pellucid grasshopper, Camnula peUitcida 43 



Red-legged grasshopper, Melanophts femur-rubrum : 40 



Red spider, Bryobia pratensis 14 



Rice weevil, Calandra oryzce 308 



Tarnished plant-bug, Lygus pratcmis 212 



Tule billbug, Sphenophorus discolor 30S 



Twelve-spotted cucumber beetle, Diabrotica 12-punctata 272 



Valley grasshopper, CEdaleonotus enigma 48 



Variegated cutworm, Lycophotia margaritosa 401 



Western grass-stem sawfly, Cephas occidcntalis 352 



Wluat joint-worm, Isosoma tritici 370 



Willow ( Stili. i: spp.) . 



Alder flea-beetle, Haltica bimarginata 206 



Baker's mealy bug, Pseudococcus bakcri < 126 



Buffalo tree-hopper, Ceresa bubalus 62 



California buckeye scale, Aspidiotus asculi 173 



Citrus thrips, Scirtothrips citri 55 



Cottonwood scale. Chionaspis ortholobis 160 



Cottony cushion or fluted scale, Icerya purchasi 110 



