fNDEX. 41 
Page. 
colothrips sexmaculatus, enemy of red spider ,...„„ 19 
Scymnus marginicollis, enemy of red spider 19 
nanus, enemy of red spider ' 19 
punctum. (See Stethorus punctum.) 
Sechium edule, food plant of Tetranychus bimaculatus 16 
Sisymbrium officinale, food plant of Tetranychus bimaculatus 16 
Slipper flower. (See Calceolaria sp.) 
Smilax, Boston, food plant of Tetranychus bimaculatus 16 
Soap, cresol, and lye-sulphur against red spider on hops 25 
nicotine sulphate against red spider on hops 26 
Solanum muricatum, food plant of Tetranychus bimaculatus 16 
Spider, red. (See Red spider.) 
Spraying apparatus and methods against red spider on hops 29 
cost, against red spider on hops . 30 
Spruce, Colorado blue, food plant of Tetranychus bimaculatus 16 
Squash, food plant of Tetranychus bimaculatus 16 
protection from red-spider injury 35 
Stethorus punctum, enemy of red spider 19 
Sunflower, food plant of Tetranychus bimaculatus 16 
wild. (See Helianthus lenticularis .) 
Sulphur against red -spider on bean 35 
hops 20-22 
reason for inefficiency 22 
plants other than hops 22 
pumpkin 35 
squash 35 
powdered, against red spider on sweet peas 35 
Sweet peas, protection from red-spider injury 35 
Tanglefoot bands against hop flea-beetle 28 
red spider on hops , 28-29 
Tetranychus bimaculatus. (See Red spider.) 
gloveri= Tetranychus bimaculatus 35 
mytilaspidis, eggs, location 10 
telarius, name wrongly used for Tetranychus bimaculatus 35 
Thistle, blessed. (See Cnicus benedictus.) 
Thrips sexmaculata. (See Scolothrips sexmaculatus.) 
Thunbergia, food plant of Tetranychus bimaculatus 16 
Tomato, food plant of Tetranychus bimaculatus 16 
Triphleps insidiosus, enemy of red spider 19 
tristicolor, enemy of red spider 19 
Tropxolum peregrinum, food plant of Tetranychus bimaculatus 16 
Verbena, food plant of Tetranychus bimaculatus 16 
Violet, food plant of Tetranychus bimaculatus 16 
Violets, hibernating place of red spider 13 
protection from red-spider injury 35 
Watermelon, food plant of Tetranychus bimaculatus 16 
Water spray against red spider on hops 26 
Wedding bells. (See Burgmansia arborea. ) 
Wistaria, food plant of Tetranychus bimaculatus f 16 
o 
