INSECTS INJURIOUS TO RASPBERRY AND BLACKBERRY 465 



cal apparatus of the insect. The female, Fig. 333a, differs some- 



what in appearance from the fact that the wing-covers are wrapped 



closely about the body, making the insect much narrower than 



her mate." (Comstock and Slingerland, I.e.) The cry of these 



tree-crickets is well known, sounding much 



like that of the katy-did, but is less 



rasping and more monotonous. They are 



heard in early evening until well into 



the night, and in the North their chirp 



is the most noticeable of all the insect 



noises at that time. This species is 



quite widely distributed and frequently 



oviposits in the tender twigs of fruit 



trees, which are similarly injured, and 



in the stalks of cotton and various woody 



weeds. 



Life History. The eggs are laid in the 

 fall and hatch in the late spring. The 

 nymphs feed mostly on plant-lice and 

 other insects, as do the adults, and though 

 they occasionally nibble foliage, they are 

 never injurious, and both nymphs and 

 adults must be regarded as beneficial as 

 far as their feeding habits are concerned. 

 In the North the nymphs become full 

 grown late in July, and there is but one 

 generation a year, but in Texas they 

 become full grown late in June and eggs 

 laid in early July hatch in about two weeks; 

 nymphs are common in late summer, and 

 the adults of the second generation in fall. 



Control. By examining the canes as soon as the foliage 

 starts, those injured may be detected and should be cut 

 out' and burned. If not numerous enough to do appreciable 

 damage they may be ignored. 



FIG. 334. Raspberry 

 stem injured by the 

 snowy tree-cricket : 

 a, wound made by 

 egg - punctures ; b, 

 longitudinal section 

 through same show- 

 ing eggs in pith; c, 

 egg enlarged ; d, cap 

 of egg, more enlarged . 

 (After Riley.) 



