TAcivAiiD.] IXSECTS OF THE GARDEN. 49 



and almost immediately destroyed by the use of carbolate 

 of lime. The doctor tried the powder in many instances 

 during the jjast summer, and found that while it was fully 

 as effective as hellebore, it was less disagreeable, less costly, 

 and perfectly safe. The method of using it is to sprinkle it 

 over the bushes as coon as the worm makes its appearance, 

 bringing it well in contact with the leaves, and soon the 

 insect is dcstro^'ed. It will need but two or three applica- 

 tions, and the work is done." 



This worm attacks the gooseberry as well as the currant, 

 though in Massachusetts its ravages have been more confined 

 to the latter shrub. As a preventive measure against its 

 farther spread, in buying or transporting gooseberry and 

 currant bushes, Walsh recommends that the roots be care- 

 fully cleaned of dirt, so that the cocoons may not be carried 

 from one garden or nursery to another. 



The Native Currant Sato Fly. — As this species maybe 

 confounded with the European saw fly, though belonging to 



Fig. 37. 



Native Currant Saw Fly. 



a different genus (Pristiphora) ., the following brief account 

 of it is extracted from my " Guide to the Study of Insects." 

 This saw fly (Fig. 37 a, larva ; 6, female, from the "Amer- 

 ican Entomologist ;" P. grossidaricB of Walsh) "is a widely 

 diffused species in the northern and western states, and 

 injures the currant and gooseberry. The female fly is shin- 

 ing black, while the head is dull yellow, and the legs are 

 * 17 



