484 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



oviposited turns, 

 brown asif the tree had 

 been scorched by fire. 

 On young trees this 

 results in destroying 

 the growth of a year 

 or two and misshaping 

 the 'tree, and the scars 

 which remain later 

 furnish points of attack 

 for borers and the 

 woolly apple-aphis. 

 Just before the 

 cicadas leave the 

 ground they are at- 

 tacked by hogs and 

 also by disease. Upon 

 leaving the ground 

 they are at once 

 assailed by a host of 

 predaceous insects and 

 various animals. One 

 of the most valuable 

 insect enemies is a 

 large wasp (Sphecius 

 speciosus Dru.), which 

 may often be seen 

 bearing the adults to 

 its burrow, where they 

 furnish food for her 

 young. The English 

 sparrow is remarkably 

 fond of the adults and 

 is the most valuable 

 factor in exterminat- 

 ing them in cities and 

 towns. It has been 



FIG. 409. Result of protecting trees with cheese- noticed that cicadas 



* 



cloth/ Above, protected trees at end of the are muc h mO re likely 

 season; below, unprotected tree at the same , 



time. Photos by W. E. Rumsey, to emerge from newly 



