048 Popular Editions of Station Bulletins of the 



The third species of economic importance, the striped tree cricket, 

 prefers for egg deposition plants with a central pith, like raspberry, 

 blackberry, and certain weeds, while their punctures are common 

 locally in elder, grape, sumac and willow. This species, unlike the 

 others, places its eggs in long rows, one above the other, and the 

 punctures are so numerous that the stems frequently break at the 

 points punctured. This is particularly true of the raspberry, and 

 makes the cricket a pest of serious economic importance under some 

 conditions. 



The female cricket may lay from one to a dozen or more eggs in 

 a night and continue the process every night or with occasional 

 intermissions until from twenty-five to seventy-five eggs are laid. 



Fig. 31. — Snowy Tree Cricket. 



a, Egg punctures and cankers in apple wood, (X 1£); b, egg in raspberry (X 2\); 

 c, egg in apple bark (X 15); d, egg cap (X 50); e, spicule of egg cap (X 500). 



The eggs are much longer than wide, are etched over most of the 

 surface with cross-hatched scratches, and each has a cap covered 

 with minute mound-like or teat-like projections. The size and shape 

 of the cap differs with the different species and serves as a means of 

 identification. 



The nymphs of the tree crickets begin to emerge from the eggs 

 during early June, and the hatching process is a most interesting 

 one. When the egg hatches, the cap at the outer end breaks off, 

 leaving its trace on the head of the emerging nymph in the shape of 



