20 BULLETIN 265, U. S. DEPARTMENT OE AGRICULTURE. 



Table VI. — Summary of larval life of first generation of the dock false-worm by instars, 



Wenatchee. Wash., 1915. 



Normal larvae. 



First instar. 



Second instar. 



Third instar. 



Fourth instar. 



Fifth instar. 



Sixth instar. 



^ H 



^ 





«M . |*H 





«_, . 



w 





«_, . i^ 





=« . 



^ 





^ , 



,_ 





°_x 



o • - 



£ 







03 



° rt 



>> 



"3 



o - 



!>> 



o ra 



03 



o ~ 



72 

 >> 



°^2 



°.d 



OQ 









fad fa § 



03 



fa. 3 





03 



fa s 





03 



fa. d 





03 









ja 



$s 



-3 



3a hsf 



^3 



,0-S 



g* 



T3 



^ 



** 



■d 



£a 



*, 



■d 



i- 



%B 



■d 



fi& 



03 



a£ a >. 



03 



a.s 



^ 



03 



a.s 



a& 



03 



S£ 



a^ 



03 



g > 



a- 



03 



ET3 ' 



3 «3 





3*d J3 03 





3T3 



03 





2^ 



3 03 





= -3 



3 03 





prO 



d 03 



"g 



5.S 



z'- 





z.a jz^ 



E- ■ 



SzjJd 



Z'° 



Eh 



z.a 



Z'<-> 





Z.a 



z' u 



E- 



z.a 



Z^ 



^ 



21 



4.5 



94.5 



1 2 



2 



l 



2 



2 



4 



2 



8 



1 



1 



1 



5 



5 



25 



3 



5 



15 



4 3 



12 



7 



3 



21 







3 



15 



1 



2 



2 



7 



6 



42 



1 



6 



6 



16 i 4 



64 



28 



4 



112 



30 



4 



120 



2 



3 



6 



6 



7 



42 



8 



6.5 



52 



2 4.5 



9 



20 



5 



100 



18 



5 



90 



4 



4 



16 



3 



8 



24 



11 



7 



77 



21 5 



105 



6 



6 



36 



3 



6 



18 



12 



5 



60 



5 



9 



45 



2 



7.5 



15 



2 5.5 



11 



5 



7 



35 



3 



7 



21 



16 



6 



96 



1 



11 



11 



3 



8 



24 



19 ! 6 



114 



2 



8 



16 



1 



8 



8 



9 



7 



63 



1 



12 



12 



12 



8.5 



102 



2 6.5 



13 



1 



12 



12 



1 



10 



10 



6 



8 



48 



1 



13 



13 



3 



1 



9.5 

 10 



28.5 

 10 



2 7 



1 8 



14 



8 













1 



4 



9 

 10 



9 

 40 



1 

 1 



17 

 23 



17 

 23 



70 



I 334 



65 





290 



2 



2 



10.5 

 11 



21 

 22 







Av 4.7 



Max 12 



Av 



Max 



4.4 

 10 



3 

 3 



11 

 12 



33 

 36 









70 i 



352 



31 





254 









Av 5 



Max 8 



Min 2 



Min...... 



2 









Av. . 

 Max. 



8.2 



23 



69 





467 



62 





410 



Av. 





. 6.7 

 . 11 

 . 4.5 



Min 2 









Av. . 

 Max 





6.6 

 12 



1 



Min. 



5 



Max. 





Min. 





Min. 







Parthenogenetic laryse. 



First instar. 



Second instar. 



Third instar. 



Fourth instar. 



Fifth instar. 



Sixth instar. 



f( . 



. 





sm . 



ei _ 



■— . ' •— i 





„_, 



w 





.__ 







,_, 



. 





©49 



c3 



O ! 



DO 

 >> 



rZ- 



o3 



o ■ 



ra 



c 2) c _■ 



03 t> 



>> 



o sg 

 3 



°.d 



>, 



om 



a 



o • 



>> 



o_2 



03 



°.d 



>, 





^ S 



o3 



i- 3 





03 



03 



H 3 





03 







03 



« d 



■~ a 



■d 



g-S 



^ 



-d 



g-a 



§ s 



T3- 



s a z ? 



T5 



sa 



S<° 



TJ 



*a 



~ i 



-d 



*a 



--- 



s.s 



a£ 



o3 



£> 



Ei 



ls 



a.s as, 



03 



a> 



a> 



03 



B£ 



a> 



"oS 



a£ 



a£ 



03 



= -d 



z'* 





dd 







= — d ~ 





= — 



S 03 





ST3 



d s3 





dd 



d :3 



O 



Z.a 





z.~ 



Z'°. 



&H 



z.= z~ 



e- 



z.a 



Z'° 



t- 



Z.q 



Z'° 





z.a 



Z'° 



Eh 



1 



2.5 



2.5 



4 



3 



12 



1 3 



3 



2 



2 



4 



3 



1 



3 



i 



5 



5 



2 



4 



8 



10 



4 



40 



16 4 j 64 



6 



3 



18 



3 



2 



6 



2 



7 ! 14 



1 



5 



5 



5 



5 



25 



1 5 5 



4 



4 



16 



3 



3 



9 



5 



8 40 



2 

 2 

 2 



6 

 6.5 



7 



12 

 13 

 14 









1 6 6 







20 



4 

 1 





20 



8 















8 



8 

 Av. . 



| 59 



Av... 4 



19 | 78 



16 i 



58 





..7.4 









6 

 2 



1 



7.5 



8 

 8.5 



45 

 16 



8.5 



Max 5 



Min 3 



Av 



Av. 



3.6 



5 

 2 



14 

 Av. 

 Max 





46 

 3.3 



8 

 1 



Max 





8 



Maj 



: 6 



Mas 



Min 





Min. 





5 



3 











Min. 





19 





124 



















Av.. 





..6.5 





















Max 





. 8.5 





















Min. 





..2.5 























Length of life of first-brood pupae. — Records of the pupal period 

 were obtained from 10 parthenogenetic pupae, 9 normal male pupae, 

 and 22 female pupae, and a summary of these records is given in 

 Table VII. 



