280 



GENERAL INDEX 



Spanworms, 96 

 Spider mites, 55, 67, 68 

 Spiders, 14 

 Spittlebugs, 55, 66 

 Spondylis upiformis, 196 

 Sprays — 



aerial, 223 



contact, 221, 223 



dormant, 222 



oil, 109, 139, 2U 



power, 223 



stomach poison, 77, 221 

 Spuds, 239 

 Stains — 



black, 182 



blue, 242 



brown, 159, 182 



stand improvement, 218 

 Stilpnotia salicis, 93 

 Styloxus 



bicolor, 47 



californicus, 47 

 Sulfur, 68 



Sun-curing, 233, 238, 2h0 

 Sun scald, 13 

 Susana cuiiressi, 122 

 Symphylids, 28, 31 

 Synaphaeta guexi, 198 

 Taniva albolineana, 80, 111 

 Telea polypheynus, 86 

 Tent caterpillars, 94 

 Terminal-shoot insects, 35 

 Termites, 14, 16, 180, 182, 206 



control, 208 

 Tetranychus spp., 68 

 Tetropium — 



abietis, 173 



velutinum, 173 

 Thamnosphecia americana, 200 

 Thecodiplosis — 



cocker elli, 70 



pini-radiatae, 70 

 Theronia fulvescens, 82 

 Thricolepsis inornata, 78, 125 

 Thysanocnemis sp., 26 

 Tip droop, 52 

 Tipula simplex, 210 

 Tortricidae, 54, 102 

 Tortrix— 



orange, 108 



sugar pine, 105 



See also Choristoneura 

 Toumeyella pinicola, 66 

 Toxaphene, 209 

 Trachykele — 



blondeli, 190 



blondeli var. juniperi, 190 



nimbosa, 190 



opulenta, 190 

 Tragosoma harrisi, 193 

 Trap-tree control, 221, 241 

 Trichiosoma lonuginosa, 122 

 Trichogramma miniitum, 92 

 Trypodendron, 185 



bivittatum, 186 



borealis, 186 



cavifrons, 186 



ponderosae, 186 



retusum, 186 



rufitarsis, 186 

 Twig insect, 35. See also kind of twig 



insect. 

 Ulochaetes leoninus, 196 

 Urocerus — 



californicus, 201 



flavicornis, 201 

 Vespamima— 



novaroensis, 179 



sequoia, 178 



Virus, polyhedral, 99, 106, 215 

 Walshomyia — 



insignis, 70 



juniperina, 70 

 Wasps — 



cvnipid, 69 



horntail, 180, 200 



parasitic, 94, 137, 216 



wood, 180, 200 

 Webber, cvpress. 80, 113 

 Webworm, fall, 79, 88 

 Weevils, 5, 26, 39, 125, 180 



acorn, 18, 26 



ash-seed, 18, 26 



bark, 73, 129, 176 



bean, 18, 27 



Cossonus, 198 



filbert, 26 



leaf, 125 



nut, 26 



pine — 



elegant, 125 

 reproduction, 44 

 white, 39 



Rhi/nocolus, 198 



root, 28, 29 

 strawberry, 29 



Spruce — 



Englemann, 40 

 Sitka, 40 



twig, 33, 39-45 



wood-boring, 198 

 White grubs, 26, 27, 28 

 Windfalls, 32, 144, 170, 213 

 Winter injury, 13 

 Wireworms, 28, 30 

 Witches' brooms, 13 

 Wood- 

 borers — 



flatheaded, 169, 187 

 metallic, 169 

 roundheaded. 173, 191 



engravers, 152 



impregnation, 180, 207 



injury, 181-182 



insects, 179, 181 



rot, 13 



wasps, 200 

 Woodpeckers, 133, 137, 215 

 Woolly bears, 87 

 Worms — 



carpenter, 199 



measuring, 96 

 Xeris — 



morrisoni, 201 



spectrum, 201 

 Xyleborinus — 



librocedri, 187 



saxeseni, 187 



tsugae, 187 

 Xyleborus — 



arbuti, 187 



scopulorum, 186 

 Xylococculus macrocarpae, 66 

 Xylocopidae, 207 

 Xylotrechus— 



abietis, 197 



annosus, 197 



insignis, 197 



nauticus, 197 



obliteratus, 197 



undulatus, 197 

 Zeiraphera, 80 



diniana. See Z. griseana. 



griseana, 109 



ratzeburgiana, 108 

 Zelleria haimbachi, 80, 112 



ft U. S. GOVERNMENT PRINTING OFFICE: 1951 927630 



