310 INSECTS INJURIOUS TO THE RASPBERRF. 



of the grape and tlie smaller branches of plum, peach, and 

 other trees. 



Remedies. — Cut out late in the fall or early in the spring 

 all those portions of the cane which contain eggs, and burn 

 them. Wherever the eggs are deposited the regular rows of 

 punctures are easily seen, and often their presence is rendered 

 still more apparent by a partial splitting of the cane. The 

 mature insects may also be destroyed in the autumn by sud- 

 denly jarring the bushes or canes on which they collect, when 

 cliey drop to the ground, and may be trodden under foot before 

 they have time to hop or fly away. 



ATTACKING THE FLOWEES. 



No. 179. — The Pale-brown Byturus. 



Byturus unicolor Say. 



This insect is a small beetle, which is sometimes very 

 destructive to the blossoms of the raspberry. It is a native 

 insect, about three-twentieths of an inch long, of a yellowish- 

 brown or pale-reddish color, and densely covered with fine, 

 pale-yellow hairs. The surface of the body, when seen under 

 a magnifying-lens, is densely punctated. This beetle is 

 shown, both magnified and of the natural size, in 

 Fig. 3-22. Fig. 322. 



Late in May and early in June, when the flowers 

 are expanding, this insect is busily employed eating 

 into and injuring or destroying the flower-buds. At 

 this period many of the flower-buds maybe found 

 with a hole in the side, through which the enemy 

 has entered and eaten away, partly or wholly, the 

 stamens, also the spongy receptacle on which they 

 are borne. Where the injury is only partial, the flower 

 usually expands; but when the sexual organs are entirely de- 

 stroyed, as is often the case, the buds generally wither and do 



