host index. lxxiii 



Shepherd's-purse (Bursa hursa-pastoi is) . Page 



Bur clover or cowpea aphis, Aphis medicaginis 90 



Cabbage aphis. Aphis brassicw 89 



Green peach aphis, Rhopalosiphum persicw 98 



Melon aphis. Aphis gossypii 90 



Oat aphis. Aphis avenw 87 



Silver-berry — see Silver Thorn. 



Silver Oak — see Grevillea. 



Sisymbrium — see Hedge Mustard. 



Smartweed {Polygonum sp.) — also see Knotweed. 



Oblique-banded leaf-roller, Archips rosaceana 441 



Smilax (Smilax spp. ). 



Citrus white fly, Dialeurodes citri 196 



Greenhouse thrips, Hcliothrips hwmorrhoidalis 54 



Two-spotted mite, TetranycJms telarius 1G 



Smoke Bush (Rhus cotinus) — also see Sumach. 



Pernicious or San Jose scale, Aspidiotus perniciosus 180 



Snapdragon (Anthirrhiwum sp.). 



Green peach aphis, Rhopalosiphum persicw 98 



Snowball (Viburnum opulus). 



Aphis viburni 94 



Apple leaf-hopper, Empoasca mali 63 



Pernicious or San Jose scale, Aspidiotus perniciosus 180 



Snowberry ( Symphoricarpos racemosus) . 



Pernicious or San Jose scale, Aspidiotus perniciosus ISO 



Sobralia — see Orchids. 



Solanum (Solatium Bpp.)-r-also see Nightshade, Potato, Potato Vine, Horse 

 Nettle, Bittersweet, Eggplant and Jerusalem Cherry. 



Barnacle scale, Ccroplastes cirri pediformis 137 



Citrus thrips, Scirtothrips citri 55 



Tobacco flea-beetle, Epitrix parvula 262 



Yellow bear caterpillar, Diacrisia virginica 390 



Solidago — see Goldenrod. 



Sonchus — see Sow Thistle. 



Sophora (Sophora sp.). 



Bur clover or cowpea aphis, Aphis medicaginis 90 



Sorous — see Chokeberry and Mountain Ash. 



Sorghum (Sorghum spp.) — also see Broom Corn and Johnson Grass. 



Oat aphis. Aphis avenw 87 



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



Sorrel (Rumcx spp.). 



Hop flea-beetle, Psylliodes pitnctulata 280 



Potato flea-beetle, Epitrix cucumeris 261 



Sour Gum (Nyssa sylcatica) . 



Pernicious or San Jose scale, Aspidiotus perniciosus 180 



Spanish Needle or Spanish Bayonet (Yucca sp.) — also see Yucca. 



Yellow bear caterpillar. Diacrisia virginica 390 



Spartina foliosa — see Cord Grass. 



Spear-grass — see Meadow Gi'ass. 



Spearmint (Mentha spicata). 



Cottony cushion or fluted scale, I eery a purchasi 110 



Speedwell — see Iron-weed. 



Spice Bush (Benzoin wstivale). 



Lintner's scale, Chionaspis lintneri 1 159 



Spinach (Spinacia oleracea). 



Beet or spinach leaf-miner, Pegomyia vicina 333 



Green peach aphis, Rhopalosiphum persicw 98 



Melon aphis, Aphis gossypii 90 



