27 



INJURY BY BARK AND WOOD BORING GRUBS. ORDER COLE- 

 OPTERA, FAMILIES BUPRESTID^. CERAMBYCID^, AND MEL- 

 ANDRYIDJE. 



CASK '^±. 



94. Buprestid. 



Work 111' (lat-ln-adi'd hark ami wninl iiiiiifr in \v<i<jil of living halsaiii lir. 

 Ivxiiiitn: Work. 



95. The Destructive Spruce-Wood Borer (Tetropinm ciniminopternin Kirhy). 



\ sleiidfr, nniiiil-ln.'U(li'<l, liark and wiind boring grul) which excavates winding 

 burrows tlirongli tlie inner bark and snrfaee of the wood, then enters tlie Siii)wood and 

 changes to the adult. Infests slightly injured, dei-lining, and recently felled red, black, 

 and white spruce. Maine to West Virginia. Common, and very destructive to the 

 wood of dying trees, and may also cause the death of slightly injured ones. 



E.xhibit: Adult and work. 



96. The Cedar Tree Borer ( Ilnlotnipcx lujneuH Fab.). 



.\ slender, whitish, bark and wood boring grul), excavating winding burrows in 

 the bark and surface of the wood of living arborvitje, causing the death of the trees, 

 and serious defects in the wood of living ones. Common in northwestern Maine. 



Exhibit: Adult and work. 



97. The Blazed-Tree Borer (Serropalpus varbalua Schall). 



.V slender, whitish, wood-boring grub, which enters at wounds on living trees and 

 bores deep into the sapwood and heartwood, causing a rapid decHV of the infested 

 parts. Common in "l)lazed" w-ounds on balsam lir and spruce trees along the trails 

 in northwestern Maine. 



Exhibit: Work. 



98. The Mountain Ash Borer (Saperda sp. ). 



A destructive enemy of the mountain a.sh, boring in the healthy wood of the main 

 stem. Northwestern Maine. 

 Exiiuut: Work. 



SECTION II. 

 INSECT ENEMIES OF FORESTS IN GENERAL. 



INJlKINii THE FOLIACiE. 



CATERPILLARS OF BUTTERFLIES AND MOTHS. ORDER 

 LEPIDOPTERA. 



99. The Violet-Tip Butterfly ( drapta intei-rngatioim Fab.). 

 I.iarva' on elm. 



Exhiiiit: .\dults, larva. 



100. The Mourning Cloak Butterfly ( E\ii(iuex.-«i nittinfni Linn.). 

 Larva- on foliage of elm, willow, and poplar, sometimes dcfnliating trees. 

 Kxiiihit: .\dulfs, larva' and pupa. 



101. The Viceroy Butterfly ( lUmUirchla archippun Cram. ). 

 I.,iirva' on willow and poplar. 



Exiiuut: .Vdult. 



102. The Bufi"-Tipped Butterfly ( f.nnrnitls hndouii Hiib.). 

 l^irxa- on oak in California. 



Exhibit: Adult. 



