22 



BULLETIN 265, U. S. DEPARTMENT OF AGRICULTURE. 



Table VIII. — Length of life cycle of the first generation of the dock false-worm, Wenatchee, 



Wash., 1915 — Continued. 



Females 



Indi- 

 vidual 

 No. 



Date oi- 



Egg dep- Hateh- 

 osition. ing. 



Apr. 25 



...do 



...do..... 



...do 



...do 



...do 



Apr. 27 

 ...do 



Apr. 28 



...do 



...do.... 



...do 



...do 



Apr. 30 



...do 



...do.... 

 ...do.... 

 ...do 



May S 



...do 



...do 



...do 



Mav 7 



..do 



..do 



..do 



..do 



..do 



Mav 8 

 ..do.... 

 Mav 9 

 ..do.... 

 ..do.... 



..do 



..do.... 

 Mav 11 

 ..do.... 

 ..do.... 

 ..do.... 



..do 



Mav 21 

 Mav 23 

 Mav 24 

 Mav 25 



Pupa- 

 tion. 



Emer 

 gence. 



June 

 ..do. 

 June 

 ..do- 

 June 

 June 

 June 

 June 

 ..do. 

 —do- 

 June 

 Jyne 

 June 

 June 

 June 

 ..do. 

 June 

 June 

 June 

 ..do. 

 June 

 July 



June 

 June 

 ..do. 

 ..do. 

 June 

 June 

 June 

 June 

 June 



do. 



18 June 

 20 June 

 24 June 



17 June 



18 June 



do. 



20 June 

 22 June 

 18 June 



do. 



27 Julv 



1 I July 



Davs in— 



12 

 12 

 12 

 12 



12 

 12 

 11 

 11 

 11 

 11 

 11 

 11 



I 11 



I 11 



11 



i -11 



11 

 11 

 13 

 15 

 16 

 17 



Larval 

 stage. 



32 

 | 32 

 34 

 34 

 37 

 46 

 35 

 ; 38 

 37 

 37 

 40 

 42 

 46 

 37 

 38 

 ' 38 

 40 

 42 

 2s 

 26 



■i, 



Pupal 

 stage. 



Total 



life 



cycle 



in davs. 



51 

 52 

 52 

 52 

 54 

 64 

 51 

 54 

 54 

 54 

 56 

 50 

 62 

 54 

 55 

 55 



Total 



Average number of days. 



265 

 12.0 



810 

 36.8 



124 

 5.6 



1199_ 



54.5 



Maximum life cycle, 64 days; minimum, 46 days. 

 Xormal average life cvcle 



10.7i; 35.9 



53.4 



1 Taken from Table V. 



The parthenogenetic life cycle averages 46.1 days, the life cycle of 

 normal males, 50.7 days, and the female life cycle, 54.5 days. The 

 average life cycle. of normal individuals of both sexes is 53.4 days. 



Length of life of first-brood adults. — The warmer weather at the 

 time the first-brood adults are flying appears to reduce the length of 

 their lives, and the average of six adults was 5.3 days, with a mini- 

 mum of 3 days and a maximum of 7 days. 



Oiiposition of first-brood adults. — Oviposition begins, in the case of 

 first-brood females, sometimes within a few hours after emergence, 

 and the maximum period observed was 5 days, with an average of 

 1.7 days. Eggs were secured from six mated females, the average 

 number being 62.3, with a maximum of 92, and a minimum of 39; 

 four single females deposited an average of 67.7 eggs, with a maxi- 

 mum of 90, and a minimum of 46. These females, being reared at 

 the laboratory from eggs deposited there by females of the previous 

 brood, may not have been quite as vigorous as those in nature, which 

 mav account for the smaller number of eggs. 



