55 



Page 



Red-shouldered ptinid borer 39 



Redwood bark-beetle 45 



Rhinoceros beetle 32 



Rocky Mountain tent-caterpillar 31 



Root-borer, Cottonwood 37 



live oak 37 



Rosy Hyparpax 30 



Round-headed borers 34, 35 



Rustic borer 38 



Rusty tussock-moth 30 



Sawflies .' 32 



Sawfly, larch 32 



large American 32 



white pine 32 



Sawyer, common pine 35 



ponderous 21 



white pine 21 



Scale insects 33 



Scolytus, California white fir 21 



fir branch : 20 



red spruce 26 



single-spine 20 



smaller fir tree 20 



Seed and fruit insects 13 



Seventeen-year Cicada 33 



Single-spine Scolytus 20 



Slug caterpillars 31 



Small-eyed Elater 42 



Smeared dagger-moth 29 



Span-worm, western oak 31 



large forest 31 



Sphinx, ash 28 



catalpa 28 



four-horned 28 



pine 28 



wavy ash 28 



western poplar 28 



walnut 28 



Spider-like clerid 42 



Spring canker worm 31 



Spruce bark-beetle 25 



American 25 



minute 2G 



black, wood-engraver 24 



borer, wavy 37 



cone-worm 33 



Cryphalus 24 



destroying beetle 26 



Douglas, bark-borer 21 



Hylesinus 20 



twig- weevil 22 



Englemann, gall-louse 23 



red, Scolytus 26 



small bark-beetle 25 



Sitka, Dolurgus 18 



gall-louse 23 



Hylurgops 19 



Tomicus 17 



twig-weevil 7 



timber-beetle 16 



twig wood-engraver, minute 24 



weevil, western 34 



white, bark-beetle 25 



wood-borer, destructive 27, 37 



Spruce wood-engraver 24 



Page. 



Sugar-cane ambrosia-beetle 45 



Tent-caterpillar, American 31 



Californian 31 



forest 30 



northwestern 31 



Rocky Mountain 31 



tufted 30 



maker, poplar 29 



Thunderbolt beetle 37 



Timber-beetle, birch 16 



cosmopolitan 16 



hickory 39 



large mahogany 46 



spruce 16 



worm, chestnut 40 



oak. (See Northern Bren- 

 this.) 



Tomicus, four-spined 18 



Hudson Bay 25 



Oregon 17, 41, 44 



silver pine 18 



Sitka spruce 17 



smaller sugar pine 17 



western five-spined 18 



Tremex, pale 40 



pigeon 40 



Trogositids 43 



Tuberculate colydiid 43 



Tufted tent-caterpillar 30 



Turpentine-beetle, dark red 19 



borer 39 



Tussock-caterpillar, hickory 29 



oak 29 



pale 29 



pine 29 



moth, California 30 



dark 30 



rusty 30 



white-marked 30 



Twig-beetle, Jeffrey pine 17 



Monterey pine 16 



Sitka spruce 17 



white pine 24 



insects 12 



maggot 23 



" miner, pine 23 



weevil, Douglas spruce 22 



Two-lined chestnut borer 38 



Underwing moths 29 



Urographis, banded 38 



Viceroy butterfly 27 



Violet-tip butterfly 27 



Walking-stick, common 32 



Walnut borer, blue-winged 36 



fruit weevil 33 



Sphinx 28 



weevil 34 



Web-worm, cherry-leaf 31 



fall 29 



oak 31 



Weevil, cypress S4, 46 



fir 34 



nut 33 



pales 34 



pine fungus-gall 22 



