THE DOCK FALSE-WORM. 



21 



Table VII. — Summary of pupal stage of first generation of the dock false-worm, Wenat- 



chee, Wash., 1915. 



Parthenogenetic males. 



Number 

 of indi- 

 viduals. 



Each. 



52 



Average 5.2 



Maximum 7 



Minimum 4 



Normal males. 



Number 

 of indi- 

 viduals. 



Days — 



Each. 



Total. 



Average 5. 5 



Maximum 6 



Minimum 4 



Females. 



Number 

 of indi- 

 viduals. 



Days- 



Eaoh. Total. 



Average 5. 6 



Maximum 8 



Minimum 4 



Life cycle and emergence of adults of first generation. — Table VIII 

 gives the complete life cycle of 10 parthenogenetic males, 9 normal 

 males, and 22 females. By life cycle is meant the period of growth, 

 or the period from the deposition of the egg to the emergence of the 

 adult. It does not include the length of adult life, during which no 

 growth occurs, nor the interval between emergence of adult and ovi- 

 position, these figures being given in a following paragraph. 



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



Wash., 1915. 



Parthenogenetic males. 



Indi- 

 vidual 

 No. 



Date of— 



Days in — 



Total 

 life 

 cycle 



Egg dep- 



Hatch- 



Pupa- 



Emer- 



Egg 



Larval 



Pupal 



osition. 



ing. 



tion. 



gence. 



stage. 



stage. 



stage. 



in days. 



1 



Apr. 30 



May 13 



June 15 



.Tune 20 



13 



33 



5 



51 



2 

 3 



...do 



...do 



June 16 

 June 17 



June 22 

 June 23 



13 

 13 



34 

 35 



6 

 6 



53 

 54 



...do 



...do 



4 



May 1 



May 14 



June 15 



June 20 



13 



32 



5 



50 



5 



...do 



...do 



...do 



. .do 



13 



32 



5 



50 







May 9 



May 19 



June 14 



June 19 



10 



26 



5 



41 



7 



...do 



...do 



June 17 



June 24 



10 



29 



7 



46 



8 



May 25 



June 3 



June 30 



July 4 



9 



27 



4 



40 



9 



...dr. 



...do 



...do 



...do 



9 



27 



4 



40 



10 





June 1 



June 20 



July 1 



9 



22 



5 



36 



Tot: 



ll .... 



112 



11.2 



297 

 29.7 



52 



5.2 



461 



46.1 













mm life cycle, .54 days; minimum, 36 days. 



Normal male , 



l 



Apr. 26 



May 7 



June 10 



June 16 



12 



31 



ii 



52 



2 



Apr. 27 





June 19 



June 2i 



12 



II 



5 



58 



3 



...do 



, .do.... 



June 21 



June 2! 



12 



43 



8 



ill 



i 



Apr. 80 



May 13 



June 10 



June 16 



13 



28 



(1 



47 



■i 



..do 



..do... 



June ii 



do . 



18 



29 



6 



47 







.do ... 





rune L3 



June it 



13 



31 



1 



48 



7 



. .do 



...do 



June 16 



June 22 



18 



34 



8 



53 



8 



May « 



Maj 16 



do 



do - 



8 



81 



ii 



15 



9 







June it 



fune 23 



8 





r. 



Hi 



457 

 60 i 





i! 



101 



11.6 



33.6 



6.6 













minimum, 12 ■ 



