INSECTS AFFECTING PARK AND WOODLAND TREES 449 



Distribution. Ihi^ ^pecit-^ probably bas a wide- distribution in the 

 eastern United States, since it has been recorded from New York. New 

 Jersey, Ohio, southwestern Pennsylvania, District of Columbia, Louisiana 

 and Minnesota. 



Natural enemies. 1 )r Hopkins has reared IC 1 a s ni <> c (• r u s t <• r ni i- 

 naius Sa\-. from wooil infested by this s])ecies in company with others, 

 and has also obtained Hypophloeus parallelus Melsh. from the 

 ^^alleries of this insect. 1 )r LcConte has reared Chariessa jiilosa 

 Forst, and IMi \- 1 1 o b a e n u s dislocatus Say from hickor)' limbs 

 infested by this species. 



Bibliography 



1S90 Packard, A. S. T. s. Km. Com. ^tli Rt-p't, |>. 296 



Chestnut timber worm 



Lv»uxv/oii scriccitiii Harr. 



A slender, white grub with a conspiriious hum)) behind the head and a dark brown, 

 obli(|uelv truncate, serrate jjo.sterior extremity, makes extensive galleries in Xhc wood of 

 li\ ing and dead ( hestnut and oak. 



This destructive borer tunnels the sapwood ami heart of chestnut in all 

 directions, thouj^di its i,^alleries are frecpiently oblique and aloni,^ the lines of 

 growth. Entrance is effected at some wound or where a limb has broken 

 off. Its work in chestnut is so abundant in man\' sections as to cause mate- 

 rial depreciation in the price of otherwise valuable timber. The parent is 

 a slender, chestnut-brown, yellow-haired beetle about ' .. inch lon_i(. The 

 larva is white, slender, cylindric, about 3/ inch lon-^. It has a peculiar hump 

 behind the light yellow head, and a hard, dark brown, excavated, ol^licpiely 

 truncate posterior extremity marorined with stout cjuadrate teeth. 



All fallen or dead timber should be removetl from the forest as soon as 

 practical, as this species breeds readily in dead trunks. Unnecessary blaz- 

 ini,f or woundiuif shoukl be avoided, since such places are very favorable 

 to infestation by this borer. 



