258 



IXDEX OF HOST TREES 



Douglas-fir (continued) 



under bark of large trunks, etc. (continued) 

 roundheaded borers — 



Phymatodes dimidiatus, 176 



Semanotus Jitigiosa, 176 



Tetropium velutinum, 173 

 Fir (Abies spp.)- — 

 in wood — 

 horntails — 



Sirex juvencus, 201 



Urocerus fiavicornis, 201 



Xeris morrisoni, 201 

 roundheaded borers — - 



Arhopalus asperatus, 195 



Arhopalus productus, 195 



Opsimus quadrilineatus, 47 



Prionus californicus, 193 



Rhyncolus spp., 198 

 Fir, Alpine (Abies lasiocarpa) — 

 attacking needles — 

 bud moths — ■ 



Acleris variana, 105 



^Choristoneura fumiferana, 102 

 caterpillar, Lambdina fiscettaria lugubrosa, 



97 

 in cones or seeds — 

 seed chalcids — 



Megastigmus lasiocarpae, 26 



Megastigmus pinus, 26 

 in smaller limbs, twigs, or trunk — 

 aphids — 



Cinara curvipes, 34 



Cinara spp., 57 

 flatheaded borer, Chrysophana placida, 4i 

 pitch nodule moth. Petrova picicolana, 52 

 roundheaded borer, Poliaenus oregonus, 4 C 

 twig beetles — 



Pityokteines elegans, 38 



Pityophthorus pseudotsugae, 38 



Pityophthorus spp.. 38 

 in wood — - 



ambrosia beetles — 



Gnathotrichus sulcatus, 185 



Platypus wilsoni, 183 



Trypodendron ponderosae, 186 

 flatheaded borer, Buprestis rusticorum. 



189 

 roundheaded borer, MonocJiamus oregon- 



ensis, 194 

 under bark of large trunk or branches — 

 bark beetles — 



Crypturgus borealis, 166 



■■'Dryocoetes confusus, 163 



"Pseudohylesinus grandis, 162 



-■'Scolytus ventralis, 158 

 bark weevils — 



"Pissodes burkei, 178 



Pissodes piperi, 178 

 flatheaded borer, *Melanophila drummond:. 



171 

 roundheaded borer, Phymatodes dimidi- 

 atus, 176 

 Fir. California red (Abies magnified-) — 

 in cones or seeds — 



cone maggot, Lonchaea viridana, 23 

 cone moths — 



Barbara colfa.viana siskiyouana, 21 



Dioryctria abietella, 22 



Eupithecia togata spermapJiaga, 22 



Laspeyresia bracteatana, 22 

 seed chalcids — 



Megastigmus pinus, 26 



Megastigmus rafni, 26 

 in smaller limbs, twigs, or trunk — 

 aphids — - 



Cinara spp., 57 

 flatheaded borer, Chrysophana placida, 47 

 twig beetles — 



Pityokteines elegans, 38 



Pityophthorus pseudotsugae, 38 



Pityophthorus sp., 38 



Scolytus praeceps, 160 



Scolytus subscaber. 160 

 i n wood — 



ambrosia beetles — 



Gnathotrichus sulcatus, 185 



I Fir, California red (continued) 

 in wood — ■ (continued) 



ambrosia beetles — (continued) 



Plaiypus wilsoni, 183 



Trypodendron spp., 185 

 flatheaded borers — 



Buprestis adjecta, 189 



Buprestis rusticorum, 189 



Chrysobothris pseudotsugae; 191 



Dicerca tenebrosd, 190 



Trachykele nimbosa, 190 

 horntail, Urocerus californicus, 201 

 other wood borer, Serropalpus barbatus, 



198 

 roundheaded borers — - 



Arhopalus asperat}is, 195 



Monochamus oregonensis, 194 

 under bark of large trunk or branches — 

 bark beetles — 



Pseudohylesinus grandis, 162 



Pseudohylesinus granulatus, 162 



■■'Scolytus ventralis, 158 

 bark weevil. Pissodes piperi. 17 s - 

 flatheaded borer, *Melanophila drummon- 



di, 171 

 roundheaded borers — 

 Leptostylus nebulosus, 176 



Semanotus litigiosa, 176 



^Tetropium abietis, 173 

 Fir, Douglas. See Douglas-fir. 

 Fir, grand (Abies grandis) — 

 attacking needles- 

 bud moths — 



Acleris variana, 105 



'■'Choristoneura iumiferana, 102 

 in cones or seeds — 



cone maggot, Lonchaea viridana, 23 

 cone moths — 



Barbara colfaxiana siskiyouana, 21 



Dioryctria abietella, 22 

 seed chalcids — 



Megastigmus milleri, 26 



Megastigmus pinus, 26 



Megastigmus rafni, 26 

 in smaller limbs, twigs, or trunk- — 

 aphid, Cinara sp., 57 

 cnermes. Chermes piceae, 59, 69 

 pitch nodule moth, Petrova picicolana, "Si 

 roundheaded borer. Opsimus quadrilinea- 

 tus, 47 

 twig beetles — 



Pityokteines elegans, 38 



Pityophthorus pseudotsugae, 38 



Pityophthorus sp., 38 



Scolytus praeceps, 160 

 twig moth. Dioryctria abietella, 49 

 twig weevil, Cylindrocopturus sp., 1.2 

 in wood — 



ambrosia beetles — ■ 



Gnathotrichus sulcatus, 185 



Platypus wilsoni, 183 



Trypodendron cavifrons, 186 



Trypodendron ponderosae, 1S6 

 bark maggot. Cheilosia hoodiana, 203 

 flatheaded borers — 



Buprestis aurulenta, 188 



Buprestis rusticorum, 189 



Chalcophora angulicollis, 187 



Clirysobothris pseudotsugae, 191 



Dicerca sexualis, 190 



Trachykele nimbosa, 190 

 horntails — 



Urocerus californicus, 201 



Xeris spectrum, 201 

 roundheaded borers — 



Monochamus obtusus, 194 



Monochamus oregonensis, 194 



Prionus califoryiieus, 193 



Xylotrechus dbietis, 197 

 under bark of large trunk or branches — 

 bark beetles — 



"Dryoeoetes confusus, 163 



■■'Pseudohylesinus grandis, 162 



Pseudohylesinus granulatus, 162 



'"Scolytus ventralis, 158 



