408 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



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. 343a. "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 to- 

 gether. By splitting the cane the 

 nature of the injury can be seen even 

 a better. Such a section is shown at b 



FlG -. 1 342 -~ The , Snow 7 tree - in the figure. The punctures extend 



cricket (Oecanthus mgncornis 



Walker): a, female; b, male, through the woody part of the cane in - 



(After Summers.) to t h e pith, and here there is in each 



an oblong, cylindrical 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. 

 Fig. 342 represents the male. Its wing-covers 

 are crossed by oblique thickenings or ribs, 

 which form part of the musical apparatus of 

 the insect. The female, Fig. 342a, differs 

 somewhat 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 Slinger- 

 land.) The cry of these tree-crickets is well 

 known, sounding much like that of the katy- 

 did, but is less rasping and more monoton- 

 ous. 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 Flp 343-Raspberrystem 

 widely distributed and frequently oviposits injured by the snowy 

 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 



tree-cricket: a, wound 

 made by egg - punc- 

 tures; b, longitudinal 

 section through same 

 showing eggs in path; 

 c, egg enlarged; d, cap 

 of egg, more enlarged. 

 (After Riley.) 



