16 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



In Table XIII are given the results from observations on 117 indi- 

 vidual insects. Further records on the same topic are found in 

 Table XVI. The larval life in the cocoon varied from 3 to 15 days 

 with an average of 7 days. In case of a very short period of from 

 3 to 5 days the larvae abandoned its first cocoon and made a new 

 one. The records, however, only show the time consumed for 

 the making of the last cocoon. Such cocoons are very primitive 

 in appearance and have not been completed. 



Table XIII. — Length of the pupal stage of the first brood, Douglas, Mich., 1910. 





Date of— 













Date of — 







No. of 



obser- 









Lar- 

 vae in 



Pu- 

 pal 



No. of 



obser- 







Lar- 

 vae in 



Pu- 

 pal 















vation. 



Leaving 

 fruit. 



Pupa- 

 tion. 



Emer- 

 gence. 



coc- 

 oon. 



pe- 

 riod. 



vation. 



Leaving 

 fruit. 



Pupa- 

 tion. 



Emer- 

 gence. 



coc- 

 oon. 



p 6 : 



nod. 











Bays. 



Days. 











Days. 



Days. 



1 



July 22 



July 25 



Aug. 9 



3 



15 



60 



July 29 



Aug. 4 



Aug. 20 



6 



16 



2 



...do.... 



July 26 



...do.... 



4 



14 



61 



July 30 



...do 



Aug. 17 



5 



13 



3 



...do 



...do 



...do 



4 



14 



62 



...do.... 



...do 



...do 



5 



13 



4 



...do 



...do 



...do 



4 



14 



63 



...do 



...do.... 



...do 



5 



13 



5 



...do 



...do.... 



Aug. 13 



4 



18 



64 



...do 



...do 



Aug. 18 



5 



14 



6 



...do.... 



...do.... 



Aug. 15 



4 



20 



65 



...do 



...do 



...do.... 



5 



14 



7 



...do.... 



...do 



...do.... 



4 



20 



66 



...do 



...do 



...do 



5 



14 



8 



...do 



...do 



Aug. 20 



4 



25 



67 



...do 



...do 



...do.... 



5 



14 



9 



...do 



Aug. C 



Aug. 19 



15 



13 



68 



...do.... 



...do 



Aug. 19 



5 



15 



10 



...do 



...do.... 



Aug. 20 



15 



14 



69 



...do.... 



...do.... 



Aug. 21 



5 



17 



11 



July 23 



July 29 



Aug. 13 



6 



15 



70 



...do.... 



Aug. 5 



Aug. 18 



6 



13 



12 



...do.... 



Aug. 4 



Aug. 17 



12 



13 



71 



...do.... 



Aug. 6 



...do.... 



7 



12 



13 



...do.... 



...do.... 



...do.... 



12 



13 



72 



...do 



...do.... 



Aug. 21 



7 



15 



14 



July 25 



July 30 



Aug. 15 



5 



16 



73 



...do 



Aug. 7 



Aug. 18 



8 



11 



15 



...do 



Aug. 1 



...do 



7 



14 



74 



...do 



Aug. 9 



Aug. 21 



10 



12 



16 



...do 



Aug. 3 



...do 



9 



12 



75 



...do 



...do 



...do 



10 



12 



17 



...do.... 



...do.... 



...do.... 



9 



12 



76 



...do.... 



...do.... 



...do.... 



10 



12 



18 



...do 



...do 



Aug. 16 



9 



13 



77 



...do 



...do 



Aug. 24 



10 



15 



19 



...do 



...do 



...do.... 



9 



13 



78 



July 31 



Aug. 4 



Aug. 17 



4 



13 



20 



July 26 



...do 



...do 



8 



13 



79 



...do.... 



...do 



...do 



4 



13 



21 



...do.... 



...do 



...do 



8 



13 



80 



...do 



...do 



Aug. 18 



4 



14 



22 



...do.... 



...do 



...do 



8 



13 



81 



...do 



Aug. 5 



...do.... 



5 



13 



23 



...do 



...do.... 



...do.... 



8 



13 



82 



...do.... 



Aug. 6 



Aug. 19 



6 



13 



24 



...do 



...do 



...do.... 



8 



13 



83 



...do 



...do.... 



Aug. 20 



6 



14 



25 



...do 



...do 



Aug. 18 



8 



15 



84 



...do 



Aug. 7 



...do.... 



7 



13 



26 



...do 



Aug. 4 



Aug. 17 



9 



13 



85 



...do 



...do 



Aug. 21 



7 



14 



27 



July 27 



Aug. 3 



Aug. 13 



7 



10 



86 



...do 



Aug. 9 



Aug. 22 



9 



13 



28 



...do 



...do.... 



Aug. 15 



7 



12 



87 



...do.... 



...do.... 



...do.... 



9 



13 



29 



...do 



...do.... 



...do.... 



7 



12 



88 



Aug. 1 



Aug. 4 



Aug. 18 



3 



14 



30 



...do 



...do 



...do 



7 



12 



89 



...do 



Aug. 5 



Aug. 19 



4 



14 



31 



...do 



...do 



...do 



7 



12 



90 



...do 



Aug. 6 



Aug. 18 



5 



12 



32 



...do.... 



...do 



Aug. 16 



7 



13 



91 



...do 



...do 



Aug. 19 



5 



13 



33 



...do.... 



...do 



...do 



7 



13 



92 



...do 



...do 



Aug. 20 



5 



14 



34 



...do 



...do.... 



...do.... 



7 



13 



93 



...do 



...do.... 



...do.... 



5 



14 



35 



...do 



...do.... 



Aug. 18 



7 



15 



94 



...do 



...do 



...do 



5 



14 



36 



...do 



...do.... 



...do.... 



7 



15 



95 



...do 



Aug. 8 



Aug. 21 



7 



13 



37 



...do 



Aug. 4 



Aug. 15 



8 



11 



96 



...do.... 



Aug. 9 



...do 



8 



12 



38 



...do 



...do 



Aug. 18 



8 



14 



97 



...do 



...do 



Aug. 22 



8 



13 



39 



...do.... 



Aug. 6 



Aug. 20 



10 



14 



98 



Aug. 4 



Aug. 12 



...do 



8 



10 



40 



July 28 



Aug. 3 



Aug. 15 



6 



12 



99 



...do.... 



Aug. 13 



Aug. 25 



9 



12 



41 



...do 



...do.... 



Aug. 10 



6 



13 



100 



...do 



Aug. 14 



Aug. 26 



10 



12 



42 



...do 



...do 



...do.... 



6 



13 



101 



...do 



Aug. 15 



Aug. 29 



11 



14 



43 



...do 



...do 



Aug. 17 



6 



14 



102 



...do 



...do 



Aug. 30 



11 



15 



44 



...do.... 



Aug. 4 



...do 



7 



13 



103 



Aug. 5 



Aug. 13 



Aug. 24 



8 



11 



45 



...do 



...do.... 



...do.... 



7 



13 



104 



...do.... 



Aug. 14 



Aug. 25 



9 



11 



46 



...do 



...do 



...do.... 



7 



13 



105 



...do 



Aug. 17 



Aug. 30 



12 



13 



47 



...do 



...do 



Aug. 18 



7 



14 



106 



Aug. 7 



Aug. 15 



Aug. 27 



8 



12 



48 



...do.... 



...do.... 



...do 



7 



14 



107 



Aug. 8 



Aug. 14 



Aug. 25 



6 



11 



49 



...do.... 



...do 



...do.... 



7 



14 



108 



...do.... 



Aug. 15 



Aug. 24 



7 



9 



50 



...do 



...do 



...do.... 



7 



14 



109 



...do 



Aug. 16 



Aug.- 30 



8 



14 



51 



...do 



Aug. 5 



Aug. 19 



8 



14 



110 



...do.... 



Aug. 17 



Sept. 1 



9 



15 



52 



...do 



...do 



...do 



8 



14 



111 



...do 



...do.... 



9 



15 



53 



...do 



Aug. 9 



Aug. 22 



12 



13 



112 



Aug. 9 



Aug. 15 



Aug." 26* 



6 



11 



54 



July 29 



Aug. 3 



Aug. 16 



5 



13 



113 



...do 



Aug. 16 



Aug. 30 



7 



14 



55 



...do.... 



...do.... 



...do.... 



5 



13 



114 



Aug. 10 



Aug. 15 



Aug. 29 



5 



14 



56 



...do 



Aug. 4 



Aug. 17 



6 



13 



115 



Aug. 16 



Aug. 25 



Sept. 14 



9 



20 



57 



...do 



...do 



Aug. 18 



6 



14 



116 



...do 



...do.... 



...do.... 



9 



20 



58 



...do 



...do.... 



...do.... 



6 



14 



117 



...do.... 



Aug. 26 



...do.... 



10 



19 



59 



An 



...do.... 



...do.... 



6 



14 















Average 









7.1 



13.6 



Ma-s 



imum 

















15 

 3 



25 

 9 



Min 



mum 



































