320 INSECTS INJURIOUS TO THE BLACKBERRY. 



ATTACKING THE LEAVES. 



No. 189.— The Blackberry Flea-louse. 

 Psylla rubi W. & R. 



This insect has been reported as common on blackberry 

 leaves in some parts of New Jersey. It is a small, four- 

 winged fly, much resembling the pear-tree Psylla (No. 70), 

 about one-eighth of an inch long when its wings are closed. 

 The mature insect is like a plant-louse in appearance, but its 

 transparent wings are diiFerently veined, and it has the power 

 of jumping briskly when disturbed, which plant-lice never 

 possess. The leaves affected curl up so as to make a safe harbor 

 for the lice-like larvae, which occupy these enclosures during 

 the greater part of the summer. To lessen their numbers, 

 gather the curled leaves and burn them. 



SUPPLEMENTAEY LIST OF INJUEIOUS INSECTS WHIOH 

 AFPEOT THE BLAOKBEREY. 



ATTACKING THE ROOTS. 



The raspberry root-borer, No. 174, and the rasp berry- root 

 gall-fly. No. 175, both injure tlie roots of the blackberry. 



ATTACKING THE CANES. 



The raspberry cane-borer. No. 176, and the red-necked 

 Agrilus, No. 177. 



ATTACKING THE LEAVES. 



The fall web-worm. No. 27 ; the apple leaf-miner. No. 50 ; 

 the waved Lagoa, No. 89'; the yellow woolly-bear, No. 146; 

 and the neat strawberry leaf-roller. No. 193. 



ATTACKING THE FRUIT. 



The flea-like negro-bug, No. 185, is common on the fruit. 



