ECONOMIC ENTOMOLOGY. 



green and water would prove more effectual; the water 

 would dislodge many of the larvae, and the remainder 

 would be destroyed by eating the poisoned leaves." 



THE AMERICAN SILK WORM. 



(Telea polyphemus. Linn.) 



Also commonly Lnown in the adult state as the Poly- 

 phemus Moth. 



The full-grown caterpillar is a very large worm often 

 approximating four inches in length. It feeds on the 

 leaves of the plum tree, and has been reared somewhat ex- 

 tensively for its silk. 



Remedies. Many natural enemies prey upon it while 

 in the larva state. It is never very injurious, its economic 

 interest lying principally in the fact of its being raised for 

 silk, but if it should prove destructive to the plum trees in 

 any locality it may be readily gotten rid of by hand picking. 



THE GREEN GRAPE VINE SPHINX. 



(Darapsa myron. Cramer.) 



We quote from Saunders, having had no opportunity of 

 personally observing the habits of this insect: "The larva 

 is one of the most common and destructive of the leaf eat- 

 ing insects injurious to the grape. The first brood of the 

 perfect or Avinged insects appears from the middle to the 

 end of May, when the female deposits her eggs on the 

 under side of the leaves, generally placing them singly, but 

 sometimes in groups of two or three. The eggs are nearly 

 round, about one-twentieth of an inch long, a little less in 

 width, smooth, and of a pale yellowish -green color, chang- 

 ing to reddish before hatching. The young caterpillar 



