THE TERRAPIN SCALE. 



13 



per cent of emergence came upon June 23 and June 30, respectively. 

 Emergence ceased September 30, after 12,336 larvge had emerged. 



Table IX gives an individual record of the scales observed in 1913, 

 showing the date of exhaustion. It also shows the effect of the 



JUNE 



JUL Y 



90 



K 80 



<o 70 



n! *\j0j t\4<\j<\jtVjrvi<\j<\i 



8 §k * •> * u> <b *-■<*> o> $ =5 3!.$ $ £ 



60 



SO 



S60 



530 



4-BO 



4 40 



^400 

 I 



k 



^280 



360 



k\24-0 



aoo 



/6o 



/20 



eo 



40 















































w 



■N 



w 









\ 









> 



/ 



\ 



J 



\ 





/ 



1 



1 



h 



^ 



< 



> 



kJ 



r 



V 



N3f 











\ 



I 



r 



-X 



• 









j 



<y 



f 



^ 



J 















"^ 



o ' [ 









y 



U 

















- 



































































































S3 



*f* 

























































i i 



i 1 , 

























































!! 























































• 



1 1 



If 



a/ 





















































J ! 



X 













3 



9 



65 









3 



? 



80 































i 

























































i 

 i 











£3 

 



5 







5 



35" 





i '; 

































: 





\ 



aJ 



'6/ 









', / 









• 

































i i 



1 





' 



X 









6 



9 ' 











































6 





*?0 



2 



u 

 /5 



* 







i 





































I i 



! 



/€ 



4- 

















s 





<? 



/5 



5 





/ 

 9 



34 



1 

 9 



32 



















J 

















3 



* 









s 





8 



i \ 





















/ 





| 



















1 



;| 







7? 





j 



4 



sfr 







42 











* 



^cr 9 



S 24 



_J L 



Is 





















& 



/ 









6 



a 



/ 







2 



O 



I 



1 





-©-J 



Fig. 2.— Emergence curve for the first 28 days of emergence of the terrapin scale, Mont Alto, Pa., 1912. 



(Original.) 



attack of Hymenoptera and the effect of the predacious beetle 

 Hyperaspis binotata Say, but does not show the total number of 

 embryos. 



