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



and attach itself to the leaf-nerv^ure, when the ovipositor is withdrawn, 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 egg-s is exhausted. The 

 eggs produced their larvae on June 14th. 



