THE DOCK FALSE-WOBM. 



25 



Life cycle and emergence of adults of second generation. — Table XII 

 gives the complete life cycle, from egg deposition to emergence of 

 adult, of 4 parthenogenetic males and 10 normal males of the second 

 generation. The only female of this generation reared to maturity 

 had an abnormal number of molts, and is included elsewhere in 

 this paper. 



Table XII. — Length of life cycle of the second generation of the dock false-worm, Wenatchee, 



Wash., 1915. 



Pathenogenetic males. 



Indi- 

 vidual 

 No. 



Date of— 



Days in— 



Total 

 life 



cycle 

 in 



days. 



Egg de- 

 position. 



Hatch- 

 ing. 



Pupa- 

 tion. 



Emer- 

 gence. 



Egg 

 stage. 



Larval 

 stage. 



Pupal 

 stage. 



1 

 2 

 3 



4 



June 21 

 ...do.... 

 June 30 

 ...do 



June 26 

 ...do.... 

 July 3 

 July 4 



July 15 

 July 16 



July 22 

 July 23 

 Aug. 1 

 ...do 



5 

 5 

 3 



4 



19 

 20 



7 

 7 



31 

 32 

 32 

 32 



July 27 



23 



5 



Tots 



a 



17 

 4.2 



62 

 20.6 



19 

 6.3 



127 

 31.7 



Ave 







Maximuruiife cycle, 32 days; 



minimum, 31 days. 



Normal males. 



1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 



June 20 



...do 



...do 



June 22 



...do 



...do 



...do 



...do 



. . .do ... . 

 June 30 



June 26 



...do 



...do 



June 28 



...do 



June 29 



...do 



June 28 

 June 29 

 July 3 



July 16 

 July 18 

 July 19 

 July 14 



...do 



July 16 

 July 17 

 July 19 

 July 26 

 Aug. 1 



July : 22 

 July 23 



...do 



July 20 

 July 22 



...do 



...do 



July 23 

 July 31 

 Aug. 6 



6 

 6 

 6 

 6 

 6 

 7 

 7 

 6 

 7 

 3 



20 

 22 

 23 

 16 

 16 

 17 

 18 

 21 

 27 

 29 



6 

 5 

 4 

 6 

 8 

 6 

 5 

 4 

 5 

 5 



32 

 33 

 33 

 28 

 30 

 30 

 30 

 31 

 39 

 37 



To1 



,al 



60 

 6 



209 

 20.9 



54 

 5.4 



323 

 32.3 









Maximu 



m life cycl 



e, 39 days; 



minimum, 28 days= 



Since the complete rearings of this generation were few in number, 

 the average life cycle of normal individuals has been compiled from 

 the figures in Tables IX, X, and XI, and is given in Table XIII. 



Table XIII. — Average life cycle of normal individuals of the second generation of the dock 

 false-worm, Wenatchee, Wash., 1915. 



Number of days in— 



Total life 



cycle in 



days. 



Egg 

 stage. 



Larval 

 stage. 



Pupal 

 stage. 



4.8 



21.3 



5.3 



31.4 



Length of life of second-brood adults. 

 length of life of second-brood adults. 



-No records were made of the 



