HOST INDEX. lxxxi 



Willow — (Continued) . Page 



Cottony maple or vine scale, Pulvinaria ritis 136 



Flat-headed apple-tree borer, Chrysobothris femorata 236 



Fruit-tree leaf Syneta, Syneta albida , 284 



Great basin tent-caterpillar, Malacosoma fragilis 411 



Greedy scale. Aspidiotus cam cilia' 175 



Mottled cottonwood plant louse, Thomasia populicola 81 



Mourning cloak butterfly, Euvanessa antiopa 461 



Oak twig-girdler, Agrilus politus 234 



Omnivorous looper, Sabulodcs cabcrata 419 



Orange Tortrix, Tortrix citrana 442 



Oyster-shell scale, Lepidosaphcs ulmi 190 



Parsnip plant louse, Siphocoryne <-<tprc<r 100 



Pernicious or San Jose scale, Aspidiotus pcniiciosits 180 



Red-huinped caterpillar, Schizura concinna 407 



Red scale, Chrysomphalus aurantii 184 



Red and yellow leaf-beetle, Cryptocephalus eastdneus 269 



Scurfy scale. Chionaspis furfura 158 



Snowy tree-cricket. OJcanthus niveus 32 



Soft brown scale, Cocus hespcridum 143 



Spotless fall web-worm, Hyphantria textor 390 



Willow scale, Ghionaspis salicis-nigrw 163 



Wistaria (Wistaria sp.)- 



Wistaria stem gall-fly. Agromyza iccbstcri 348 



Woodbine (Ampclopsis ccitchii) — also see Virginia Creeper. 



Cottony maple or vine scale, Pulvinaria ritis 136 



Wormwood (Ambrosia artcmisiirfolia) . 



Pale-striped flea-beetle, Systena blanda 28-~> 



Woundwort — see Hedge Nettle. 



Xanthorrhoea — see Grasstree. 



Xanthoxylum — see Prickley Ash. 



Xantium canadense — see Cockle Bur. 



Yam ( Dioscorea sp. ). 



Greedy scale, Aspidiotus camellia- 175 



Yarrow (Achillea spp. ). 



Beet root aphis. Pemphigus beta* 76 



Greenhouse Orthezia, Orthezia insignis 112 



Pubescent Hoplia, Hoplia pubeseens 243 



Yew (Ta-rus cuspidata). 



Purple scale, Lepidosaphcs beckii 1S6 



Yucca {Yucca sp. ) — also see Spanish Needle. 



Diplacus Ceroputo, Ceroputo yucca" 12.j 



Ivy or oleander scale, Aspidiotus hederce 177 



Oyster-shell scale, Lepidosaphcs ulmi 190 



Zamia (Zamia spp.). 



Hemispherical scale, Saissetia hemisphwrica 152 



Long-tailed mealy bug, Pseudococcus longispinus 131 



Zamia scale, Diaspis zamice 168 



Zantedcschia — see Calla. 



Zea — see Corn. 



Zingiber — See Ginger. 



Zinnia (Zinnia sp.). 



Western 12-spotted cucumber beetle, Diabrotica soror 271 



Zizia (Zizia aurea I. 



Parsnip plant louse, Siphocoryne caprcw 100 



Zizyphus (Zizyphus sp.). 



Black Parlatoria, Parlatoria siziphus 193 



F— 13664 



