D 



IMPORTANT NORTH AMERICAN FOREST INSECTS 7 



THE TURPENTINE BORER 



Buprcstis apricans Hbst. 



The turpentine borer attacks the exposed wood resulting from 

 fire scars, blazes, and turpentined faces of several species of southern 

 pines, making the trees susceptible to windthrow, and the butt log 

 unfit for lumber. In recent years, with the wider adoption of con- 

 servative turpentining practices and forest management, injury by 

 this insect is receiving greater recognition (8, 19). 



THE LOCUST BOBEB 



Cyllene rooiniae Forst. 



The locust borer frequently prevents the growth of a valuable 

 tree, the black locust, in some regions. It occurs throughout the 

 Eastern States and has been introduced with the host into Colorado 

 and adjacent States (17, 29, Jf.1). 



THE OAK TWIG PRUNER 



Elaphidion villosum Fab. 



The oak twig pruner. occurring throughout the eastern half of 

 the United States, locally causes serious damage to various hard- 

 woods by cutting off the branches. The pruning in this case is done 

 by the larvae (48) . 



THE SUGAR MAPLE BOBEB 



Glycol ius gpeciogus Say 



The sugar-maple borer is an especially injurious pest of the sugar 

 maple tree in the Northeastern States. This borer attacks trees 

 apparently in full vigor, especially those growing in the open, and 

 kills limbs and sometimes the entire tree. This insect is probably 

 the most serious enemy of the sugar maple tree (25). 



THE LIVING HICKORY BOREB 



Goes pulcher Hald. 



THE LIVING BEECH BOREB 



Goes pulverulenta Hald. 



THE WHITE OAK BOREB 



Goes tigrina DeGeer 



THE OAK SAPLING BOREB 



Goes tessellata Hald. 



The four species of roundheaded borers listed above attack the 

 trunks of a variety of hardwoods, including oak. hickory, beech. 

 elm. sycamore, blue beech, and ironwood. throughout the eastern 

 part of the United States. The larvae bore deeply into the wood, 

 causing large, unsightly defects and culls in the lumber. In younger 

 trees these defects frequently cause breakage under the strain of 

 wind or ice storms (18). 



