38 THE EED SPIDEE ON HOPS IN CALIFORNIA. 
Page. 
Cnicus benedictus, food plant of Tetranychus bimaculatus 16 
Coccinella 9-notata, enemy of red. spider 19 
Coffee tree, Kentucky. (See Gymnocladus canadensis.) 
Convolvulus sp. (See Morning-glory, wild.) 
Copulation of Jed spider 12 
Corn, food plant of Tetranychus bimaculatus 16 
Cost of spraying hopyards for red spider 30 
Cotton, food plant of Tetranychus bimaculatus 16 
Cowpea, food plant of Tetranychus bimamlatus 16 
Cucumber, food plant of Tetranychus bimaculatus 16 
protection from red-spider injury 35 
Cultural methods against red spider on hops 30-34 
Cuphea, food plant of Tetranychus bimaculatus 16 
Cypress vine, food plant of Tetranychus bimaculatus 16 
Dahlia, food plant of Tetranychus bimaculatus 16 
Datura stramonium, food plant of Tetranychus bimaculatus 16 
Disella hederacea, food plant of Tetranychus bimaculatus 16 
Eggplant, food plant of Tetranychus bimaculatus 16 
Euthripsfuscus, enemy of red spider 19 
occidentalism enemy of red spider 19 
Ferns, food plants of Tetranychus bimaculatus 16 
Fertilization against red spider on hops 33-34 
Feverfew, food plant of Tetranychus bimaculatus 16 
Flea-beetle, hop. (See Psylliodes punctulata.) 
Flour paste against red spider on hops 24-25. 26 
plants other than hops and cotton 34-35 
and lime-sulphur against red spider on hops 23-24 
value of a second ap- 
plication 26-27 
preparation 27 
lye-sulphur against red spider on hops 25 
lime-sulphur, and nicotine sulphate against red spider on hops ... 26 
spray, preparation 27 
Fuchsia, food plant of Tetranychus bimaculatus 16 
Geranium memlatum, food plant of Tetranychus bimaculatus : 16 
Geranium, wild. (See Geranium memlatum.) 
Godetia, food plant of Tetranychus bimaculatus 16 
Goldenglow. (See Rudbeckia sp.) 
Groundnut. (See Apios apios.) 
Gymnocladus canadensis, food plant of Tetranychus bimaculatus 16 
Hedge mustard. (See Sisymbrium officinale.) 
Helianthus lenticularis, food plant of Tetranychus bimaculatus 16 
Heliotrope, food plant of Tetranychus bimaculatus 16 
Hemp, food plant of Tetranychus bimaculatus 16 
Hippodamia convergent, enemy of red spider 19 
Hollyhock, food plant of Tetranychus bimaculatus 16 
Honeysuckle, food plant of Tetranychus bimaculatus 16 
Hop flea-beetle. (See Psylliodes punctulata.) 
Hop tree. (See Ptelea trifoliata.) 
vines, male and female, relative effect of red spider thereon 17 
stripping them for control of hop aphis 30 
red spider 30-32 
