146 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



Table XXIX. — Spring brood of pups. Length of the pupal stage of overwintering 

 lame collected from banded trees in 1910 and reared in vials. 





Dare of— 









Date of— 







Xo. of 

 indi- 

 vidual. 





Sex. 



Length 



of 

 pupal 

 stage. 



Xo. of 

 indi- 

 vidual. 





Sex. 



Length 



of 

 pupal 

 stage. 



Pupa- Emer- 

 tiori. gence. 



Pupa- Emer- 



tion. gence. 









Days. 









Days. 



1 



Mar. 14 May 6 



£ 



43 



34 



Mar. 31 May 16 





46 



2 



Mar. 16 ■ Apf. 26 



c? 



41 



35 



--.do May 12 



c? 



42 



3 



Mar. 17 Apr. 29 



3 



43 



36 



...do Mav 16 



9 



47 



4 



...do Apr. 28 



: 



42 



37 



...do Mav 18 



d 1 



48 



5 



Mar. IS Apr. 30 



Q 



43 



38 



...do May 16 



<? 



46 



6 



Mar. 20 Mav 1 



O 



42 



39 



Apr. 1 ... do 



9 



45 



7 



...do Mav 3 



(? 



44 



40 



...do Mav IS 



<? 



47 



8 



...do Mav 2 



3 



43 



41 



...do Mav 20 



9 



49 



9 



.-.do Mav 1 



<? 



43 



42 



...do Mav 27 



9 



56 



10 



...do Apr. 30 





41 



43 



Apr. 3 Mav 19 



c? 



46 



11 



Mar. 23 Mav 4 



5 



44 



44 



...do Mav 20 



9 



47 



12 



Mar. 24 Mav 5 



d 



44 



45 



Apr. 5 May 21 



9 



47 



13 



...do May s 



? 



45 



46 



Apr. 4 ...do 





47 



14 



...do May 5 



c? 



42 



47 



Apr. 5 ...do 



9 



46 ■ 



15 



Mar. 25 ...do 



9 



41 



48 



...do do 



9 



46 



16 



Mar. 26 May 8 



c? 



42 



49 



Apr. S May 22 



d" 



44 



17 



Mar. 2S ...do 



a 



41 



50 



...do do 



§ 



44 



IS 



...do Mav 9 



9 



42 



51 



Apr. 9 Mav 21 



42 



19 



...do , May 10 



p 



43 



52 



...do Mav 22 



9 



43 



20 



...do May 



J 



39 



53 



...do May 18 



<? 



39 



21 



...do Mav 11 



£ 



44 



54 



Apr. 10 Mav 22 



3 



42 



22 



...do May 10 



■3 



43 



55 



Apr. 11 ...do 



8 



41 



23 



Mar. 29 \ Mav 11 



p 



43 



56 



Apr. 16 Mav 26 



c? 



40 



24 



...do Mav 10 



~ 



42 



57 



...do Mav 23 



c? 



37 



25 



...do I.. .do 







43 



58 



...do May 30 



c? 



44 



26 



...do Mav 12 



9 



44 



59 



Apr. 1> Mav 26 



c? 



38 ; 



27 



Mar. 30 May 13 



9 



45 



60 



...do May 28 



9 



40 



28 



...do 



Mav 15 



o 



46 



61 



Apr. 20 Mav 29 



9 



39 : 



29 



Mar. 31 



Mav 13 



c? 



43 



62 



Apr. 21 ...do 



9 



38 



30 



...do 



Mav 16 



9 



46 



63 



Apr. 22 May 30 



~S 



38 ' 



31 



...do 



...do 



2 



46 



64 



Apr. 23 June 1 



<? 



39 ' 



32 



...do 



...do 



9 



46 



65 



...do do 



c? 



39 



33 



...do do 



9 



46 



66 



Mav 11 June 11 





31 



Table XXX shows the variations in the length of the pupal period 

 for 156 individuals as recorded in Tables XXYIH and XXIX: 



Table XXX. — Spring brood of pupte. Variation in the length of the pupal period as 

 recorded in Tables XXVIII and XXIX. 



Pupa?. 



Days. Pupae. Days. 



Pupa?. Days. 



Pupa?. 



Days. 



1 

 1 

 1 

 2 

 5 



30 3 37 



31 9 3S 

 33 6 39 



3.5 6 40 



36 12 41 



24 42 

 28 i 43 

 23 44 



12 45 



13 46 



6 

 1 

 o 



i 



47 

 48 

 49 

 56 



Tables XXY1TI and XXIX show that individuals which pupated 

 early usually remained longer in the pupal state than those which 

 later became pupa?. 



Temperature conditions. — The temperature conditions influencing 

 the pupal periods of the spring brood of pupa? are shown in the follow- 

 ing table: 



