53 



Page. 



Borers, flat-headed 3S 



round-headed 35 



Brenthis, northern 39 



Bronze birch borer 21, 38 



Brown-tailed moth 30 



Buck moth 29 



Buff-tipped butterfly 27 



Buprestis, golden 39 



Butterflies and moths 27 



California tussock moth 30 



Californian Pbryganidia 29 



tent-caterpillar 31 



Callidium, chestnut 3(5 



Canadian Leptura 37 



Canker worm, spring 31 



Catalpa Sphinx 28 



Cedar bark-beetle 25 



western 18 



borer, western 21 



borer 38 



tree borer 27 



Cherry-leaf web worm 31 



Chestnut-borer, two-lined 38 



callidium 36 



timber- worm 10 



Chion, belted 36 



Cicada, seventeen -year 33 



small western 23 



Clerid, clouded 26 



dubius 42 



hairy 42 



orange banded 42 



spider-like '. 42 



Clerids 42 



Click-beetles 42 



Clytus, red-headed 37 



Colorado Dendroctonus 44 



Colydiids 43 



Companion bark-beetle 41 



Cone-worm, spruce 33 



southern pine 33 



Cosmopolitan timber-beetle 16 



Cottonwood root-borer 37 



Crinkly flannel moth 31 



Cryphalus balsam fir 24 



hairy 16 



spruce 24 



Cypress, bald, bark-beetle 42, 46 



borer, curious 36 



rigid 37, 46 



white-lined 36, 46 



Lawson, bark-beetle 45 



sapwood borer 39, 46 



weevil 34, 46 



Dagger-moth, American 29 



smeared 29 



Dark red turpentine beetle 19 



Dark tussock-moth 30 



Dendroctonus, Arizona 42, 44 



Colorado 44 



Douglas spruce 19, 44 



mountain pine 19, 42, 44 



Densely punctured bark-beetle 16 



Destroyer, fir-tree 21 



western pine 18 



Page. 



Destroyers, bark-beetle 26, 42 



Destroying beetle of the Black Hills, pine 41, 43, 44 



spruce 26 



Destructive pine bark-beetle 41 



spruce wood-borer 27, 37 



Dolurgus, Sitka spruce 18 



Dryophilus, giant arborvitse 23 



Dubius clerid 42 



Elater, eyed 42 



small-eyed 42 



Elm leaf-beetle, imported 32 



larger 32 



Eyed elater 42 



Fall web-worm 29 



Fir, balsam, bark-beetle 25 



Cryphalus 24 



bark-beetle, smaller 17 



western '. 17 



branch scolytus 20 



California white, Scolytus 21 



grand, bark-beetle 20 



tree destroyer 21 



Scolytus, smaller 20 



weevil 31 



wood-engraver 19 



Five-spined Tomicus, western 18 



Flat-headed borers 38, 39 



Foliage insects 32 



Forest span-worm, large 31 



tent caterpillar 30 



Four-horned Sphinx 28 



Four-spined Tomicus 18 



Fruit and seed insects 



Fungus following bark-beetle attack . , 



Gall insects 22, 23 



louse, Englemann spruce 23 



Sitka spruce 23 



Girdler, hickory twig 34 



poplar 35 



Golden Buprestis 39 



Goldsmith beetle 32 



Green trogositid 43 



Gypsy moth 30 



Hackberry butterfly, common 28 



Hairy clerid 42 



Cryphalus 16 



Hemlock bark-beetle, western 20 



bark-borer, eastern .' 38 



bark-borer, western 38 



wood-stainer, western 15 



Hickory bark-beetle 41 



borer, beautiful 36 



common 36 



flat-headed 38 



painted . , 36 



tiger 36 



caterpillar, black 30 



striped 30 



horned devil 28 



husk-worm 33 



soft-scale 33 



timber-beetle 39 



tussock caterpillar 29 



twig-girdler 34 



Horntail, banded ".. 40 



