AN EGG-PARASITE OF THE CURRANT SAW-FLY. 221 



and attach itself to the leaf-nervure, when the ovipositor is withdrawn, 

 and the egg left in position. Moving backward a very little, another egg 

 is similarly deposited, and in like manner the operation is continued, until 

 the leaf has its assigned quota, or the supply of eggs is exhausted. The 

 eggs produced their larvae on June 14th. 



