350 Report of the Entomologists of the 



which they make. All of the soft -parts of the leaves are finally 

 devoured, leaving' only the midrib and larger veins. (Plate 

 XXIV.) 



When the bushes are badly infested the new canes also suffer 

 severe injury. The young expanding- leaves are first devoured 

 and finally in some instances the bark and succulent wood of the 

 new growth is injured. (Plate XXV.) 



Injury to the buds and young fruit. — The injury to the buds 

 and fruit is much less extensive than to the leaves. On the Shaffer 

 raspberries, in the field previously referred to, small percentages 

 of the buds and fruits were injured. In every instance the buds 

 and fruits were only partially devoured, the larvae usually eating 

 away a portion from the side as shown at Plate XXVI, Fig. 1, 



DESCRIPTIVE DETAILS. 



i 



DESCRIPTIONS AND EIFE HISTORY; 



First appearance in the spring. — The time when the adults 

 come out of the ground in the spring undoubtedly varies accord- 

 ing to the season. During the past 2 years the adults were not ob- 

 served in the vicinity of Geneva before May 10. Last spring they 

 were very common by May 25. 



The egg. — Egg laying begins soon after the adults appear. 

 Last spring a few eggs had been laid by May 18. May 27 the 

 eggs were abundant. They are deposited from the under surface 

 of the leaf. The female makes a slight incision with her saw- 

 like ovipositor (Plate XXVI.II, to the right of Fig. 2) and forces 

 the egg under the cuticle and close up to the leaf vein near whicli 

 the incision is made. Plate XXV [, Fig. 2, is from a photograph of 

 the under surface of a raspberry leaf showing the eggs, nearly 

 ready to hatch, natural size. Fig. 3 is enlarged from a portion of 

 the same leaf. (The engraver lias made 1 the egrffs in this figure 

 show more distinctly than natural.) 



When first deposited the eggs measure about 0.8 mm. in length. 

 In about 48 hours thev have increased slightly in size and con- 



