288 



AA^ ECONOMIC ENTOMOLOGY. 



be made is constant watching by some man especially employed, 

 who will destroy the borers just as soon as their presence is 

 noticed, and who will gather the moths beneath the electric lights 

 now found in most cities. Pans in which oil or some other sub- 

 stance is kept to kill the insects falling into them, properly 

 arranged just beneath the lights, will prove of considerable 



Fig. 321. 



The wood "leopard-moth," Zeuzera pyrina. — a, b, larva, from above and side, about 

 half grown ; c, male, d, female ; e, larval burrow, showing the tendency of the full- 

 grown caterpillar to girdle its food plant. 



benefit ; but it will take years of steady work to lessen the insects 

 in some of our cities, and to remove them as a source of danger 

 to the shade-trees. 



In the i^imAy JVochddcs, or "owlet-moths," we have a large 

 number of species, and among them many that are troublesome 

 to the agriculturist. The moths are, as a rule, sombre gray or 

 brown, expanding when the wings are spread between one and 

 three inches, averaging perhaps an inch and a half in the majority 

 of cases. The fore-wings are comparatively narrow, rather short 



