24 



BULLETIN 265, U. S. DEPARTMEXT OF AGRICULTURE. 



Table X. — Summary of larval life of second generation of the dockfalse-v:6rm, byinstars, 



Wenatchee, Wash., 1915. 



Normal larvae. 



First instar. 



Second instar. 



Third instar. 



Fourth instar. 



Fifth instar. 



Sixth instar. 



<__ 



;_ 





,_ . 



«_, 





_ . — 





t_, . 



ii_, 





«_; . 



._ 





^ 



«w I 



03 



o _■ 



>> 



c3 



o ^ 



>> 



^3 



o J 





c3 



• 



>= 





~ : .= 



00 



°JS 



■- x ~ 



- - 



SJ 



C3 





& a 



=3 





03 







03 



s- 3 



- = 



c3 



s- 3 



-3 



T3 



~~ 



£o 



T5 



XJ-rt 



■° ™ 



-« 



£3 



1- 



'C 



'-.x 



g s 



■C 



. g;d 



£§ 



•a 



n& 



S >> 



"3 



&£, 



£ >■. 



"ea 



g > 



S£ ' 



a > 



B J > 



C3 



g > 



2 & 



3 



d > 



S >. 



03 





'*£ 







s J 





S'O 



3,3 





= TJ 



■z - 





— T3 



= X 



g 



= -s 



3 o3 





£.H 



&° 





5.ti 



2'° 



Eh 



z.= 



Z'° 



H 



2.= 



Z>'° 



EH 



!z:-fc! 



Z - 



E-- 



fc.S 



Z' c 



En 



l 



1 



1 



24 



1 



24 



13 



1 



13 



3 



l 



3 



10 



3 



30 



1 



5 



5 



5 



2 



10 



14 



2 



28 



25 



2 



50 



22 



2 



44 



14 



4 



56 



4 



6 



24 



16 



3 



48 



4 



3 



12 



3 



3 | 9 



12 



3 



36 



8 



5 



40 



6 



7 



42 



18 



4 



72 



1 



4 



4 



1 



4 | 4 



4 



4 



16 



6 



6 



36 



4 



9 



36 



3 



5 



15 









1 



6 6 



1 



5 



5 



3 



1 



/ 

 8 



21 



8 



2 



10 20 



43 





146 



43 





68 



43 





82 



42 : 



104 



42 





191 



17 



127 



A v. 





..3.4 



Av. 





1.6 



Av 1.9 



Av 



2.5 



Av 



4.5 



Av.. 



..... 7.4 



Max 





.. 



Max 





4" 



Max. 6 



Max 







Max 



8 



Max. 



10 



Min 





.. 1 



Min 





1 



Min 1 



Min 



1 



Min 



3 



Min. 



5 















Parthenogen 



etic larvae. 













. 17 



3 



51 



16 



1 



16 



7 



1 



7 



4l 



1 



4 



1 



2 



2 



4 



7 



28 



• 22 



4 



88 



27 



2 



54 



34 



2 



- 68 



21 



2 



42 



9 



3 



27 



1 



8 



8 



8 







40 



4 



3 



12 



6 



3 



18 



18 

 3 



3 



4 



54 



12 



20 

 6 

 7 

 3 



4 

 5 

 6 



7 



80 

 30 

 42 

 21 



1 



13 



13 



47 





179 



47 





82 



47 





93 



46 





112 



46 





202 



6 





49 



Av. 





..3.8 



Av. 





1.7 



Av 2 



Av 



2.4 



Av 



4.4 



Av.. 



8.1 



Max 





.. 



Max 





3 



Max 3 



Max 



4 



Max 



7 



Max. 



13 



Min 





.. 3 



Min 





1 



Min 1 



Min 



1 



Min 



2 



Min. 



7 



Length of life of second-brood pupae. — Pupal records were obtained 

 from 12 normal pupae, all males, with one exception, and from 3 

 parthenogenetic pupae, and a summary of these records is given in 

 Table XI. 



Table XI. — Summary of pupal stage of second generation of the dock false-worm^ 

 Wenatchee, Wash., 1915. 



Normal individuals. 



Parthenogenetic males. 



Number 

 of indi- 

 viduals. 



Days — 



Number 

 of indi- 

 viduals. 



Days- 



Each. 



Total. 



Each, i Total. 



1 



2 

 6 

 3 



1 



4 

 5 

 6 

 8 



8 

 30 

 18 



8 



1 

 2 



5 



7 







14 



12 



Average 



Maximu 

 Minim u 



64 

 5.3 



3 



Average 

 Maximu 

 Minimu 





19 

 6.3 



m 



m 



8 

 4 



m 



m 



5 



