INDEX. 39 
Page. 
Hops, foliage, as affected by red spider 17 
food plant of Tetranychus bimaculatus 1 G 
quality, as affected by red spider 17-18 
Horse-chestnut, food plant of Tetranychus bimaculatus 16 
Hydrangea, food plant of Tetranychus bimaculatus 16 
Iron weed, food plant of Tetranychus bimaculatus 16 
Irrigation against red spider on hops 32-33 
Ivy, English, food plant of Tetranychus bimaculatus '. 16 
Jamestown weed. (See Datura stramonium.) 
Jerusalem-oak weed, food plant of Tetranychus bimaculatus 16 
Jimson weed. (See Datura stramonium.) 
Lactuca scariola, food plant of Tetranychus bimaculatus 16 
Lettuce, prickly. (See Lactuca scariola.) 
Ligustrum amurense, food plant of Tetranychus bimaculatus 16 
Lily, Easter, food plant of Tetranychus bimaculatus 16 
Lime-sulphur against red spider on hops 22-24 
and flour paste against red spider on hops 23-24 
value of second applica- 
tion 26-27 
preparation 27 
nicotine sulphate against red spider on hops 26 
nicotine sulphate, and flour paste against red spider on hops 26 
Lippia nodiflora, food plant of Tetranychus bimaculatus 16 
Lye-sulphur against red spider on hops 25 
and cresol soap against red spider on hops , 25 
flour paste against red spider on hops 25 
Mallow. (See Malva parviflora.) 
alkali. (See Disella hederacea.) 
Malva parvijlora, food plant of Tetranychus bimaculatus 16 
hibernating place of red spider 13 
Man as affected by red spider .. 18 
Manettia, food plant of Tetranychus bimaculatus 16 
Maple, food plant of Tetranychus bimaculatus. 16 
Mat-grass. (See Lippia nodiflora.) 
Medicago hispida, food plant of Tetranychus bimaculatus 16 
sativa. (See Alfalfa.) 
Mignonette, food plant of Tetranychus bimaculatus 16 
Mimulus, food plant of Tetranychus bimaculatus 16 
Moonflower, food plant of Tetranychus bimaculatus 16 
Morning-glory, food plant of Tetranychus bimaculatus : 16 
wild, food plant of Tetranychus bimaculatus 16 
hibernating place of red spider 13 
Mustard, hedge. (See Sisymbrium officinale.) 
Nicotine solutions against red spider on hops 25-26 
sulphate against red spider on hops 26 
and cresol soap against red spider on hops 26 
lime-sulphur against red spider on hops 26 
lime-sulphur, and flour paste against red spider 26 
Okra, food plant of Tetranychus bimaculatus 16 
Onion, food plant of Tetranychus bimaculatus 16 
Parthenogenesis in red spider 12-13 
Passiflora, food plant of Tetranychus bimaculatus 16 
