INSECTS AFFECTING PARK AND WOODLAND TREES I9I 



nearby limhs, some attaching- themselves to leaves, others locating in 

 crevices at the axil of lea\es anil at the base of biuls, only a portion of 

 those at the base of biuls sLir\i\ing' the winter. Minute )'oung of this 

 generation are almost invisible, but as the winter apjjroaches they secrete 

 from the (.U)rsal pores a coating of coarse, white threads, which make them 

 more conspicuous. The old winti'r coat is molted in the s|)ring, about the 

 thirtl wi'ek in April, alter which a mort; copious wool)- c:oating is produced. 

 The first eggs were obser\etl at Amherst Mass., May 9. 



Natural enemies. This species is subject to attacks by several natural 

 enemies. The larva of the common lace-winged 11)', C h r )■ s o p a a re u a t a 

 Say., feeds voraciously on the n\inphs of this insect as they issue from the 

 galls. Protection of smaller insectivorous birds such as tits, the nuthatch 

 and golden-crested wren, has been recommended because they probably 

 prey on this plant louse to some extent. 



Remedial measures. Thorough spraying of infested trees in April, 

 with a \vhale oil soap solution, i lb to 2 gal. of water, has proved \'ery 

 effectual in checking this insect. The galls may also be cut off and burned 

 in June, thus destroying" the insects. 



Bibliography 

 1S97 Cooley, R. A. Mass. Agric. Col. 34th Rep't, p. 91-99 



Rose leaf hopper 



Typhlocyba rosac Harris 



Small, yellowish white. Jumping insects about 'Xo inch long occur in swarms during 

 midsummer, on rose leaves. 



This is one of the common pests of rose growers and occasionally these 

 small leaf hoppers cause a great deal of injury. They winter under fallen 

 leaves and rubbish on the surface of the ground and appear on rose bushes 

 some time in May, occurring on the underside of the foliage, in all stages, 

 during the greater part of the summer. They draw the sap from the foliage 

 and thus produce whitish, discolored spots which, if the injury be severe, 

 results in the affected leaves turning yellow and dropping. 



