260 



INDEX OF HOST TREES 



Hemlock, mountain (continued) 

 in wood — 



ambrosia "beetles — 



Gnathotrichus retusus, 185 

 Gnathotrichus sulcatus, 185 

 Platypus wUsoni, 183 

 Trypodendron ponderosae, 186 

 flatheaded borers — - 



Ckrysobothris caurina, 191 

 Trachykele nimbosa, 190 

 roundheaded borer, Xylotreehus undidatus, 

 197 

 under bark of main trunk or branches — 

 bark beetle, Scolytus tsugae, 166 

 flatheaded borer, Melanophila dnnnmondi, 



171 

 roundheaded borer, Phymatodes dimidiatus, 

 176 

 Hemlock, western (Tsuga heterophyUa)— 

 attacking needles — 



bud moth, *Acleris variana, 105 

 caterpillars— 



Choristoneura jumiferana, 102 

 ■■'Lambdina fiscellaria lugabrosa, 97 

 Nepytia canosaria, 101 

 Kepytia- pliaiitasmaria, 101 

 sawfly, -'Xeodiprion tsugae, 120 

 in smaller limbs, twigs, or trunk — 



chermes, Chermes tsugae, 60 

 in roots of seedlings — 

 aphid, Cinara spp.. 34 

 carpenter ant, Camponotus spp.. 34 

 weevil, Brachyrhinus ovatus, 29 

 in wood — 



ambrosia beetles— 



Gnathotrichus retusus, 185 

 Gnathotrichus sulcatus, 185 

 Platypus icilsoni, 183 

 Trypodendron bivittatum, 186 

 Trypodendron cavifrons, 186 

 Xyleboriiius tsugae, 187 

 bark maggot, Cheilosia alaskensis, 202 

 roundheaded borer, Leptura obliterata, 196 

 under bark of main trunk or branches — 

 bark beetles — 



Dendroctonus pseudotsugae, 155 

 Hylastes nigrinus, 155 

 Hylurgops rugipennis, 154 

 Pseudohylesinus tsugae, 166 

 Scolytus tsugae, 166 

 flatheaded borer, ■■'Melanophila drummondi, 



171 

 roundheaded borer, Tetropium velutimim, 

 173 

 Juniper (Juniperus spp.) — 



in smaller limbs, twigs, or trunk — 

 flatheaded borers — 



Ckrysobothris nixa, 47 

 Ckrysobothris spp., 190 

 roundheaded borer. Callidium juniperi 



(Ariz., N. Mex.). 47 

 scale, Diaspis carueli, 66 

 twig beetles, Phloeosinus spp., 39, 73 

 twig girdlers — 



Methia juniperi, 47 

 Styloxus bicolor, 47 

 in roots of seedlings — 



weevil, Brachyrhinus ovatus, 29 

 in wood — 



flatheaded borers — - 



Chrysobotkris nixa, 47, 190 

 Ckrysobotkris spp., 190 

 on leaves — 



spider mites, Tetranychus spp., 68 

 under bark of main trunk or branches — 

 bark beetles, Phloeosiiius spp., 73, 167 

 roundheaded borers — 

 Semanotus juniperi, 176 

 Semanotus ligneus ampins, 176 

 Juniper, alligator (Juniperus pachyphloea) — 

 in smaller limbs, twigs, or trunk — 

 twig beetles — ■ 



Phloeosinus spp., 39 

 Phloeosinus koreri, 39 



Juniper, alligator (continued) 

 in wood — 



flatheaded borer, Ckrysobothris ignicollis, 

 191 

 under bark of large trunk or branches — 

 bark beetles — 



Phloeosinus aciculatus, 168 

 Phloeosinus utahensis, 168 

 Juniper, one-seed (Juniperus monosperma) — 

 in smaller limbs, twigs, or trunk — 

 twig beetles — 



Phloeosinus spp., 39 

 in wood — 



flatheaded borer, Chrysobotkris ignicollis, 

 191 

 on leaves — 

 galls— 



Rkopalomyia sabinae, 70 

 lYalskomyia juniperina, 70 

 Juniper, Rocky Mountain (Juniperus scopu- 

 lorum) — 

 in smaller limbs, twigs, or trunk— 



roundheaded borer. Callidium californicum, 



47 

 twig beetles — 



Phloeosinus hoj'eri, 39 

 Phloeosinus hoppingi, 39 

 Pkloeosinus spp., 39 

 in wood — 



flatheaded borers — - 



Ckrysobothris ignicollis, 191 

 Ckrysobotkris texana, 191 

 on leaves — 



gall, Walskomyia insignis, 70 

 under bark of large trunk or branches — 

 bark beetle, Pkloeosinus scopulorum, 168 

 Juniper, Sierra (Juniperus occidentalis) — 

 attacking leaves — 



needle miner. Recurvaria juniperella, 113 

 in smaller limbs, twigs, or trunk — 

 flatheaded borers — 



Chrysobotkris nixa, 47, 190 

 Ckrysobotkris viridicyanea, 47 

 roundheaded borer, Callidium californicum, 



47 

 twig beetles — 



Pkloeosinus ckamberlini, 39 

 Pkloeosinus koppingi, 39 

 Phloeosinus rugosus, 168 

 in wood — 



flatheaded borers — 



Chrysobotkris nixa, 190 

 Trachykele blondeli juniperi, 190 

 under bark of large trunk or branches — 

 bark beetles — 



Pliloecsinus juniperi, 167 

 Pkloeosinus punctatus, 167 

 rounded borer, Semanotus ligneus amplus, 

 176 

 Juniper, Utah (Juniperus utahensis) — 

 in smaller limbs, twigs, or trunk- 

 twig beetles — 



Pkloeosinus spp., 39 

 Pkloeosinus hoferi, 39 

 in wood — 



flatheaded borers — 



Ckrysobothris ignicollis, 191 

 Ckrysobothris texana, 191 

 on leaves — 

 galls— 



Allomyia juniperi, 70 

 Oligotropkus betheli, 70 

 Rkopalomyia sabinae, 70 

 under bark of large trunk or branches — 

 bark beetle, Phloeosinus utahensis, 168 

 roundheaded borer, Semanotus juniperi, 

 176 

 Larch, western (Larix occidentalis) — 

 attacking needles — 

 bud moths — 



Choristoneura fumiferana, 102 

 Zeiraphera griseana, 109 

 sawflies — 



Anoplonyx laricivorus, 120 



