THE TEKRAPIN SCALE. 



17 



Table XII gives a summary of these data, with some additional 

 details from Tables VII and IX. It also compares 13 normal females 

 from each isolation. 



Table XII. — A summary of the emergence data from Tables VII, VIII, IX, X, and XI. 



No. 



Year. 



Number 

 of females. 



Number 

 of larva? 

 emerged. 



Average 

 number 



per 

 female. 



Emer- 

 gence 

 started. 



Maxi- 

 mum 

 daily 

 emer- 

 gence. 



Emer- 

 gence, 50 

 per cent. 



Emer- 

 gence^ 

 percent. 



Emer- 

 gence, 

 100 per 

 cent. 





19121.. 

 1913... 



/Total 26. . . 

 \Normall3. 

 /Total 41... 

 \Normal 13. 



4,258 

 2,753 

 12,336 

 5,211 



163.7 

 211.8 

 297. 95 

 400.8 



June 16 

 ...do.... 



June 13 

 ...do.... 



June 18 

 ...do.... 



...do 



...do.... 



June 25 

 ...do.... 

 June 23 

 June 24 



July 1 

 ...do 



June 29 

 July 10 



July 15 



„ 



Do. 



Sept. 30 





Do. 



i All females on twigs were dissected July 15. The isolated females in 1912 bad all stopped producing 

 young by July 15. 



/300 



/aoo 

 //oo 

 /ooo 



kl 900 



I 



*< 8oo 

 \ 



nJ 



700 



K 



600 



kl 



$1 SOO 



^ 400 



\ 



300 



aoo 

 /oo 



* ^* 's * .* .* * a* a -a a s & & fc * -si ^ ■« •» ♦ 











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a9 tf 













































1 ' * 

 1 ' ! 









/a 



2 



































1 * ' 



fi i 



f04 



A ' 



i 







































i 



1 



i 





ii 











































\ t 







1 













































\ 

 1 











1 



73 



O 























i 



o 



69 



5 





IN 



\e 



'%< 



* 



65 



sl\ 



























i 54- 



€ 





56 



6- 



7 



xr 

 58 



oS 



\ 

 I 







i 























if 





















l 

























J/3< 



?? 

















i i 





.Q 



37 



€ 



3/ 







































' I 



1 1 









K 

















r 



9-5 



















6 



J7 



6 



/ 



78 



/ 



4-7 



.</ 



57 







18 



P4 



3 

































66 



5 



/ 



Eig. 3.— Emergence curve for the terrapin scale; first 22 days of emergence, June 13 to July 4, inclusive, 

 Mont Alto, Pa., 1913. (Original.) 



20782°— Bull. 351—16 2 - 



