54 



Page. 



Horntail, black pine 40 



blue 40 



small pine 40 



-white horned 40 



yellow winged 40 



Horn tails 40 



Hudson Bay Tomicus 25 



Hylesinus, Douglas spruce 20 



shore pine 20 



Hylurgops, Sitka spruce 19 



western pine 19 



Imperial moth 28 



Katydid 32 



Large mahogany timber-beetle 46 



Larch sawfly 32 



Leaf-beetles 32 



Leaf-beetle, imported elm. 32 



larger elm 32 



spotted willow 32 



striped willow 32 



Leaf-folder, locust 27 



Leopard moth 40 



Leptura, Canadian 37 



Lichen-like beetle 36 



Linden borer 36 



Line-marked colydiid 43 



Locust borer 35 



leaf-folder 28 



Lunated long-sting 41 



Mahogany timber-beetle, large 46 



Maple scale, cottony 33 



gloomy 33 



sugar, borer 35 



worm, green-striped 29 



worm, semi-looping 29 



Mourning cloak butterfly 27 



Mountain ash borer 27 



Mulberry borer, ash colored 36 



Northern Brenthis 39 



Northwestern tent-caterpillar 31 



Nut weevils 33 



Oak bark-beetle, minute 24 



western 16 



borer, dusty 36 



southern 37 



variable 37 



carpenter worm 40 



caterpillar, green 30 



red humped 30 



live, root-borer 37 



pruner 34 



span-worm, western 31 



timber- worm. (See Northern Brenthis.) 



tussock caterpillar 29 



twig Ormyrus 22 



web- worm - 31 



wood-stainer 45 



worm, orange-striped 28 



worm, spiny 28 



Orange-banded clerid 42 



Oregon Tomicus 41, 44 



Ormyrus, oak twig 22 



Pales weevil 34 



Pale Tremex 40 



tussock caterpillar 29 



Page. 



Parasites, four- winged 43 



of rigid cypress borer 4g 



spruce-destroying beetle 26 



wood-boring insects 42 



Parmacheene bark-beetle 26 



Pigeon Tremex 40 



Pine bark-borer, fiat-headed 38 



small 35 



birdseye 22 



borer, black-horned 37 



knob-horned 35 



lesser 35 



obsolete 35 



ponderous 35 



ribbed 37 



butterfly 28 



cone-worm, southern 33 



destroyer, western 18 



destroying beetle of the Black Hills. 41, 43, 44 



fungus-gall weevil ." 22 



horntail, black 40 



small 40 



heartwood borer 39 



hylurgops, western 19 



Jeffrey, twig beetle 17 



knobcone, bark-beetle 16 



lodgepole, bark-beetle 16 



mountain, Dendroctonus 42, 44 



wood-engraver 17 



sawyer, common 35 



shore, Hylesinus 20 



silver, Tomicus 18 



Sphinx 28 



sugar, bark-weevil 22 



smaller Tomicus 17 



wood-engraver 18 



tussock caterpillar 29 



twig maggot 23 



miner 23 



white, Abbott's, sawfly 32 



sawyer 35 



twig-beetle 24 



weevil 34 



wood-engraver 25 



wood-perforator 23 



stainer, eastern 15 



western 15 



yellow, wood-engraver 17, 44 



Pitch-eating weevil 34 



Platypus, Pan-American 39, 45 



western 15 



Polyphemus moth 28 



Ponderous sawyer 21 



Poplar borer 35 



carpenter worm 40 



girdler 35 



Sphinx, western 28 



tent-maker 29 



Powder-post beetles 23, 39 



Prionus, broad-necked 37 



lesser 37 



Pruner, oak 34 



Ptinid , giant arbor vitee 23 



borer, red-shouldered 39 



Red-headed Clytus 37 



