S HA DE T KR EE INSECTS 
go. Severe pruning and the forcing of the growth has caused 
affected trees to outgrow the injury from this pest when not too 
severe. Many of the larve die from fungous diseases and othe 
causes. 
8. HICKORY BORER 
Family CERAMBYCID. Species Cyllene carye Gahan 
gt. This species is very closely related to the locust borer, 
and for a long time the two were confused or considered as the 
same insect. The locust borer feeds entirely upon the black locust, 
but the hickory borer feeds upon hickory, walnut, mulberry, 
Osage orange and honey locust, but not on black locust. 
g2. It has been discussed in the literature under the follow- 
ing names: Leptura picta Drury, Leptura robine Forst., Clytus 
Hexuosus Fabr., Clytus pictus Drury, Clytus robine  Forst., 
Cyllene robiné Forst., Cyllene pictus Drury, and Cyllene carye 
Gahan. The last name has been in use but a short time in the 
American literature. 
93. The larve work under the bark and in the wood of dead 
or dying trees; consequently, it is not of great importance as a 
shade tree pest. 
94. The control consists in keeping the trees in a healthy con- 
dition, or in the use of repellents during the egg laying period 
from April through May. 
g. LINDEN BORER 
Family CERAMBYCID. Species Saperda vestita Say 
95. This species is very similar in its habits to the round- 
headed apple tree borer, working at the base of the tree and in the 
roots, and burrowing under the bark or deep into the wood. Very 
little is known about its life history or the length of the larva stage. 
Its food is probably restricted to the linden, although this species 
has also been reported upon elm, poplar and apple. 
96. The beetle is a typical Saperda, black in color, but cov- 
ered with a dense olive pubescence. There are usually three spots 
on each wing cover where the pubescence is wanting, and the spots 
show as black. In some specimens, part or all of these spots may 
be wanting. The adults appear the latter part of the summer, 
and feed for a time upon the tender bark and leaves, and may 
when abundant, cause some injury in this way. 
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