344 IJVSECTS INJURIOUS TO THE RED CURRANT. 



eggs are laid on the stems of the currant-bushes late in the 

 autumn. 



Where these insects prove troublesome, they may be subdued 

 with the same remedies as are recommended for No. 205. 



No. 207.— The Ohio Currant Saw-fly. 



Pi^istipliora rujipes St. Fargeau. 



This insect is referred to in Dr. Fitch's twelfth " Annual 

 Report^' as entomologist for New York State, as occurring in 

 the vicinity of Cleveland, Ohio, in 1858. The larvae are of 

 a pea-gieen color, with black heads; they live together in 

 clusters, and eat the leaves, beginning at the edge and de- 

 vouring all except the coarser veins. As they move they 

 spin a very light web from leaf to leaf, and they are said to 

 let themselves down to the ground^ when disturbed, by a fine 

 thread of silk. When mature, they are three-eighths of an 

 inch long, the segments of the body are slightly wrinkled, 

 and along each side is a row of protuberances or warts of the 

 same color as the body. When ready for their next change, 

 they enter the ground and form small oval cocoons, within 

 which they change to chrysalids. 



The fly is black, with transparent wings and light-brown 

 legs. 



No. 208. — The Currant Span-worm. 

 Evfitcliia ribearia (Fitch). 



In many districts this is a very common insect ; it may be 

 easily distinguished from the saw-fly caterpillars by its pecu- 

 liar mode of progression, arching its body into a loop at 

 every step ; in Fig. 357 the larva is represented in various 

 attitudes. When disturbed, it lowers itself suddenly by a 

 silken thread from the bush on which it has been feeding, 

 and remains snspended in mid-air until the threatened dan- 

 ger is past, when it regains its former position. It is a native 

 insect, and is frequently found on the wild currant and goose- 

 berry bushes in the woods. AVhen full grown, the caterpillar 



