464 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



therefore, two years may be required for maturing a generation, 

 and the fact that the pest does not increase may be due to the 

 cutting back of the injured tips of the young canes. 



Control. As soon as the tips are seen to droop they should 

 be cut off below the point girdled and burned. When the entire 

 canes die from the effect of being tunneled, they should be cut 

 in late summer before the larva? have gone to the base to hiber- 

 nate. Where such measures are practised the pest may be effec- 

 tively controlled. 



The Snowy Tree-cricket * 



When the canes fail to put out leaves in the spring and are 

 found to be dead, this often proves to be due to a long ragged 

 wound like that shown in Fig. 334a. " If the rough surface of 

 the wound be cut away with a knife, the injury will be found to 

 consist of a longitudinal series of punctures placed close together. 

 By splitting the cane the nature of the injury can be seen even 

 better. Such a section is shown at b in the figure. The punctures 



extend through the woody part of 

 the cane into the pith, and here 

 there is in each an oblong, cylin- 

 drical egg. One of these eggs is 

 represented enlarged at c. The 

 insect which thus seriously injures 

 the raspberry canes in preparing 

 a safe receptacle for its eggs is 

 a delicate greenish-white cricket. 

 On account of its color and its 

 habit of living among the foliage 

 of trees and shrubs, it has received 

 the popular name of the Snowy 

 Tree-cricket. Fig. 3336 represents the male. Its wing-covers are 

 crossed by oblique thickenings or ribs, which form part of the musi- 



FIG. 333. The snowy tree- 

 cricket (Oecanthus niveus De 

 G.): a, female; b, male en- 

 larged. (After Summers.) 



* (Ecanthus niveus DeG. Family Gryllidoe. See Comstock and Slinger- 

 land, Bulletin 23, Cornell Univ. Agr. Exp. Sta., p. 124; H. O. Houghtoh, 

 Entomological News, Vol. XIV, p. 57. 



