INDEX OF HOST TREES 



269 



Poplar (continued) 



attacking leaves — (continued) 

 leaf miners — (continued) 



Phyllonorycter salicifoliella, 115 

 Phyllonorycter tremuloidiella, 115 

 sawfly, Cimbex americana, 122 

 in smaller limbs, twigs, or trunk — 

 flatheaded borers — 



Chrysobothris femorata, 47 

 Chrysobothris mali, 47 

 roundheaded borer, Saperda populnea, 48 

 twig girdler, Agrilus anxius, 46 

 in wood — 



ambrosia beetle, Trypodendron retusus, 



186 

 carpenter worm — 

 Acossus popidi, 200 

 Prionoxystus robiniae, 199 

 clear-winged moths — 

 Aegeria apiformis, 200 

 Aegeria tibialis pacifica, 200 

 Paranthrene robiniae, 200 

 flatheaded borers — - 

 Acmaeodera spp., 191 

 Buprestis confluenta, 189 

 Buprestis viridisuturalis, 189 

 Chrysobothris spp., 190 

 Poecilonota spp., 191 

 Polycesta spp., 191 

 powder-post beetle, Lyctus spp., 204 

 roundheaded borers — 



Malacoptorus tenellus, 198 

 Prionus californicus, 193 

 Synaphaeta guexi, 198 

 Xylotrechus annosus, 197 

 sapwood weevils — 

 Cossonus spp., 198 

 Rhyncolus spp., 198 

 weevil, ■■'Cryptorhynchus lapathi, 198 

 on twigs — 



scale, Lepidosaphes ulmi, 66 

 spider mites — 



Paratetranychus spp., 68 

 Tetranychus spp., 68 

 under bark of large trunk or branches — - 

 roundheaded borer, Saperda calcarata, 

 174 

 See also Cottonwood. 

 Poplar, balsam (Populus tacamahacca) — 

 attacking leaves — 



leaf beetle, Galerucella decora, 124 

 Redcedar, western (Thuja plicata) — 

 attacking leaves — ■ 



caterpillar, Lambdina fiscellaria lugu- 

 brosa, 97 

 in roots of seedlings (nursery) — 

 weevil, Brachyrhinus ovatus, 29 

 in smaller limbs, twigs, or trunk — 

 tip moth, Argyresthia cupressella, 112 

 in wood — 



ambrosia beetles — 



Gnathotrichus sulcatus, 185 

 Trypodendron cavifrons, 186 

 flatheaded borers — 



Trachykele blondeli, 190 

 Trachykele opulenta, 190 

 sapwood weevils — ■ 

 Cossonus spp., 198 

 Rhyncolus spp., 198 

 under bark of large trunk or branches — 

 bark beetles — 



* Phloeosinus punctatus, 167 

 Phloeosinus squamosus, 168 

 roundheaded borers — 

 Altimia dorsalis, 176 

 Semanotus amethystinus, 175 

 Semanotus ligneus amplus, 176 

 Redwood (Sequoia sempervirens) — 

 in cones or seeds — - 



cone borer, Phymatodes nitidus, 24 

 in smaller limbs, twigs, or trunk — 

 mealybugs — 



Pseudococcus ryani, 66 

 Pseudococcus sequoiae, 66 



Redwood (continued) 



in smaller limbs, twigs, etc. (continued) 

 roundheaded borer, Callidium semper- 

 virens, 47 

 scale, Cryptaspidiotus shastae, 66 

 in wood — 



ambrosia beetle, Gnathotrichus sulcatus, 



185 

 horntail, Sirex aerolatus, 201 

 other wood borer, Serropalpus barbatus, 



198 

 roundheaded borers — 

 Callidium. pallidum, 195 

 Leptura obliterata, 196 

 Prionus californicus, 193 

 under bark of large trunk or branches — 

 bark beetle, Phloeosinus sequoiae, 168 

 roundheaded borers— 



Phymatodes nitidus, 176 

 Semanotus ligneus sequoiae, 176 

 Sequoia, giant (Sequoia gigantea) — 

 in smaller limbs, twigs, or trunk — 



roundheaded borer, Callidium sequarium, 



47 

 scale, Cryptaspidiotus shastae, 66 

 in wood — 



ambrosia beetle, Gnathotrichus sulcatus, 



185 

 flatheaded borer, Trachykele opulenta, 



190 

 powder-post beetle, Hadrobregmus gibbi- 

 collis, 206 

 under bark of main trunk or branches — 

 bark beetle, Phloeosinus rubicundulus, 



168 

 roundheaded borers — 



Phymatodes nitidus, 176 

 Semanotus ligneus amplus, 176 

 See also Redwood. 

 Spruce (Picea spp.,) — 



in roots of seedlings (nursery) — 

 maggot, Hylemya cilicrura, 31 

 weevil, Brachyrhinus ovatus, 29 

 in wood — 



horntail, Sirex juvencus, 201 

 roundheaded borers — 



Arhopalus asperatus, 195 

 Opsimus quadrilineatus, 47 

 Ulochaetes leoninus, 196 

 Xylotrechus undulatus, 197 

 sapwood weevils — 

 Cossonus spp., 198 

 Rhyncolus spp., 198 

 Spruce, bigcone (Pseudotsuga macrocarpa) — 

 in cones or seeds- 

 seed chalcid, Megastigmus spermotrophus 

 nigrodorsatus, 26 

 under bark of large trunk or branches — 

 bark beetle, Pseudohyle sinus serratus, 162 

 Spruce, blue (Picea pungens) — 

 attacking needles — - 

 needle miners — 



Recurvaria piceaella, 111 

 Taniva albolineana, 111 

 in cones or seeds — 



cone moth, Laspeyresia youngana, 22 

 seed chalcid, Megastigmas piceae, 26 

 in smaller limbs, twigs, or trunk- — 

 aphids — 



Cinara spp., 57 

 chermes — 



Chermes cooleyi, 58 

 Pineus pinifoliae, 61 

 Pineus similis, 62 

 twig beetle, Pityophthorus sp., 39 

 in wood — 



ambrosia beetles — ■ 



Gnathotrichus sulcatus, 185 

 Trypodendron bivittatum, 186 

 flatheaded borer, Buprestis aurulenta, 188 

 under bark of large trunk or branches — 

 bark beetles — 



■ f Dendroctonus engelmanni, 163 



