112 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 2 



eggs during their life time, an attempt was made to get a similar 

 record for individuals of the second seasonal generation. For this 

 experiment nymphs iii the last stage of development were collected 

 from the field, taken to the laboratory, reared to adults and from 

 them, on August 10, 1908, fourteen pairs were selected and isolated in 

 4-oz. bottles with suitable food. Unfortunately the mortality among 

 these specimens was very high, due, I am now convinced, to an excess 

 of moisture accumulating in the bottles. Consequently the record is 

 unsatisfactory, but at the same time rather interesting. 



Egg Laying Record of Fourteen Females of Second Generation 



Out of this number separated on August 10 seven died between 

 August 2-4 and 27, after laying from 12 to 36 eggs each. Three more 

 died August 31, September 4 and September 7, each having laid 3& 

 eggs. On September 21 another female died at 44 days of age from, 

 maturity, after laying 4 egg masses containing 46 eggs in all. 



There remained only three females out of the original fourteen and 

 as they laid a larger number of eggs and lived so much longer, their 

 individual record seems to be of particular interest and is as follows: 



The female of Pair No. 8 became adult on August 7 or 8, lived 

 until October 5, or 58 days, and deposited 72 eggs, or a mass of 12 

 eggs each on the following dates: August 20 and 24, September 8, 

 17, 21 and 26. 



The female of Pair No. 9 became adult August 8, lived until October 

 10, or 63 days, and deposited 71 eggs, or a mass of 12 eggs each, — ex- 

 cept once, when only 11 eggs were found, — on the following dates: 

 August 20 and 29, September 2, 10 (11 eggs), 17 and 21. 



The female of Pair No. 10 became adult August 7 or 8, lived under 

 observation until October 10, when she escaped, after depositing 84 

 eggs or 7 masses of 12 eggs each on the following dates: August 20^ 

 and 29, September 7, 11, 20, 25 and 29. 



As already stated, it seems i^robable that the females that died so 

 soon after maturity were killed by excessive moisture in the vials. In 

 other words, the moisture caused them to adhere to the sides of the 

 bottles, where they died in struggles to loosen themselves. As this 

 experiment was followed closely, I feel confident in concluding that 

 the average number of eggs deposited by the second brood is six or 

 seven masses of 12 eggs each, or from 72 to 84 eggs. This is less than 

 the average for the hibernating brood. 



