20 



BULLETIN 265, U. S. DEPARTMENT OF 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. 



=M . 



<M 





•M . • 



VH 





>M - 



1H 





=M . 



•M 





■M • 



<« 





«*H 



<M 





Ojn 



* 



s. 



03 



"fl 



>> • 



°,i2 

 03 



"* 



>> 



03 



U fl 



& 



£ 



03 



o • 



>> 



o,2 



°fl 



>> 



« 3 







fe s 







& 3 







&! 3 





03 



fe 3 





03 









£5 



•^ ^ 



Tj 



£5 



£* 



•O 



^s 



£«> 



-a 



if5 



.Q * 



T3 



£2 



£ a> 



T3 



*3 



T3 



*> 



a >> 



03 



045 



Q>. 



03 



045 



0£ 



03 



045 



a>, 



03 



045 



a^ 



03 



0^ 



a >> 



o3 



§■3 



OS 





3T3 



p 03 





PT3 



p « 





pn3 



3 o3 





P-d 



p 03 





p-a 



P 03 





20 



2'° 



Eh 



2.3. 



2' U 



&H 



2.0 



2 ,,J 



EH 



2.0 



2' 



Eh 



2d 



£' U 



Eh 



2.3 



2^ 



Eh 



21 



4.5 



94.5 



1 



2 



2 



i 



2 



2 



4 



2 



8 



i 



1 



1 



5 



5 



25 



3 



5 



15 



4 



3 



12 



7 



3 



21 



5 



3 



15 



i 



2 



2 



7 



6 



42 



1 



6 



6 



16 



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 

 1 





14 

 ' 8 















1 



4 



9 

 10 



9 

 40 



1 

 1 



17 

 23 



17 

 23 



8 



70 





334 



65 





290. 



2 

 2 



10.5 

 11 



21 

 22 











Av 



4.4 



10 



2 



3 

 3 



11 

 12 



33 

 36 









70 

 Av. 



352 







12 



Max 





31 



Av.. 





ou 



5 



8 







8.2 



.. 23 



...... 5 



69 





467 





m 



62 





410 



Av.. 



.'. 6.7 



Min 



2 









Av.. 





6.6 



Min. 



Max. 





11 

 4.5 

















12 

 1 











Min. 











Parthenoger 



letic larvse. 















First instar. 



Second instar. 



Third instar. 



Fourth instar. 



Fifth instar. 



Sixth instar. 



=M 



<M 





•K . 



SM 





<M 



<w 





=-_, , 



■M 





<*H ■ 



«m 





et _ l 



■M 





° £ 



03 



"fl 



& 



03 



^ 



£ 



03 



u * 



£ 



o » 



03 



fl 



is-. 



OB 



03 



O J 



>> 



°i3 



03 



i 



03 



-a 



fc* 2 







fe 3 







fe 3 







fe 3 





o3 





&i § 





u p 





^2 



^■" 



13 



£S 



^o> 



tJ 



£2 



^s 



T3 



£5 



s s 



'd 



*2 



£ ® 



-o 



S2 



£oi 



045 



a >> 



c3 



a.s 



a >> 



03 



045 



a £> 



03 



04^ 



a s. 



03 



045 



0& 



03 



045 



F £ 



03 



3T3 



p 03 





ST) 



p c3 





pd p o3 





p-a 



p =6 





p-O 



3 o3 





pd 



3 c3 



O 



2.0 



2' U 



Eh 



2.0 



2'° 



H 



2.0 2"° 



Eh 



2.0 



z ,(J 



Eh 



2 .a 



2'° 



Eh 



2.0 



2'^ 



EH 



i 



2.5 



2.5 



4 



3 



12 



1 3 



3 



2 



2 



4 



3 



1 



3 



1 



5 



5 



2 



4 



8 



10 



4 



40 



16 4 



64 



6 



3 



IS 



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 



6 



12 









1 6 



6 



4 



5 



20 



4 

 1 



5 



8 



20 

 8 







2 



6 5 



13 

 14 



19 

 Av. 

 Mas 

 Min 







8 

 Av.. 

 Max 



j 59 



2 



7 





19 1 





16 





58 



3.6 



5 



?, 



6 

 2 

 1 



7.5 



8 



8.5 



45 

 16 

 8.5 



5 



3 



Av 4 



Max 6 



Min 3 



Av 



14 

 Av. 



Max 

 Min. 







46 

 3.3 



8 

 1 





8 



Max 

 Min 









5 







19 





124 



















Av.. 



6.5 























Max. 



. 8.5 























Min. 



2.5 





















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

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

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

 Table VII. 



