218 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 4 



deposited in the same interval of time by the former will usually be 

 higher than that of the latter. A female of nigricornis was observed 

 to lay seventeen eggs in a cane during one night, which greatly exceeded 

 the number deposited in the same time in apple wood by niveus. 

 The eggs of nigricornis were laid in linear series. The number of eggs 

 in a row are variable. Of twenty-five egg masses selected at random, 

 the number ranged from one to eighty-one, giving an average of thirty 

 eggs to a row. The number of eggs in a series is sometimes increased 

 by several ovipositions at varying intervals by the same female. 



The females of quadripundatus in breeding cages deposited their 

 eggs in rows similar to nigricornis in the petioles of the leaves. The 

 injuries to the plant are not so extensive as with the latter species, 

 and the scars are therefore much less conspicuous. 



The oviposition period and the numbers of eggs deposited by the 

 females of the three species are as follows : 



OVIPOSITION PERIOD AND NUMBER OF EGGS DEPOSITED BY INDIVIDUAL 



TREE CRICKETS 



