CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 323 



Three-fourth inch long, stout, flattened, yellowish; dorsum of head 

 and first six abdominal segments with chitinous points. 



Control. — Badly infested branches should be cut out and burned 

 in winter or spring. Spray infected trunks and branches with kerosene 

 (1:2 of water) in late fall after leaves have fallen to kill the young 

 larvae in the bark. 



Fig. 210. — The hickory borer {Cyllene picla) on dead or dying hickory. 



Cyllene picta Drury bores in hickory and elm. Adult is velvety 

 black with many pale yellow lines across the thorax and elytra 

 (Fig. 210). 



Sugar Maple Borer {Plagionotus speciosus Say). — Apparently 

 healthy trees are attacked. 



Adult. — Nearly an inch long; black marked with yellow. Antennae 



