KATYDIDS INJURIOUS TO ORANGES IjST CALIFORNIA. 



In 

 O 



the usual number of eggs, from 1 to 3, are laid overnight, at which 

 time oviposition mostly occurs. Oviposition decreases during the 

 fall months and usually ceases entirely about midwinter. Females 

 which have ceased to oviposit in winter may be induced to begin 

 again by placing them in an artificially warmed atmosphere. Thus, 

 one of a number of females which had ceased to oviposit about the 

 middle of November, when taken from a temperature of 40° F., early 

 in December, and placed in a room heated to 75° F., began to oviposit 

 and laid 8 eggs hi the course of an hour. A single female in the course 

 of her life deposits, on an average, about 175 eggs. Infrequently 

 individuals held in captivity from the middle of July to the following 

 December have deposited about 230 eggs. The following complete 

 individual records were obtained from specimens which emerged in 

 captivity and were kept there, under nearly field conditions, until 

 death: 



Table I. — Oviposition record of the fork-tailed katydid, Lindsay, Cal., 1912. 



No. of 

 specimen. 



Number 



of eggs 



deposited. 



No. of 

 specimen. 



Number 



of eggs 



deposited. 



1 



169 



10 



206 



2 



172 



11 



74 



3 



121 



12 



140 



4 



174 



13 



230 







114 



14 



87 



6 



64 



15 



142 



7 



78 



16 



239 



8 



132 



17 



61 



9 



57 



18 



159 



Most of the eggs of this species are deposited during the period 

 from the latter part of July to the last of September, though ovipo- 

 sition still occurs as late as the first week in December in warm 

 winters, and adults have been found ovipositing as early as June 18. 



LENGTH OF LIKE OF ADULTS. 



Adults reared in screened cages, protected from their natural 

 enemies and given an abundance of fresh food daily, lived, on an 

 average, 125 days, or a little over four months. In a few exceptional 

 eases individuals lived from 150 to 160 days — 162 days in the case 

 of a single specimen being the record longevity. 



KNK.MIKS OF 'I'lIK ADULT. 



Birds undoubtedly play an important part in reducing the num- 

 ber of adults each year. Under field conditions adults are less 

 numerous in October and November than in July and August, yet 

 specimens protected by Large screen cages Jive, through October and 

 most of November as actively as during the first few weeks of their 

 mlnlt life, in certain orchards where the infestation was particu- 



