THE TEEKAPIN 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 larvse 

 emerged 



Average 

 number 

 per 

 ■ female. 



Emer- 

 gence 

 started. 



Maxi- 

 mum 

 daily 

 emer- 

 gence. 



Emer- 

 gence, 50 

 per cent. 



Emer- 

 gence, 75 

 percent. 



Emer- 

 gence, 

 100 per 

 cent. 





1912 1. . 

 1913... 



/Total 26... 

 \Normal 13. 

 /TotaHl... 

 \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. 



y 



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

 Diing by July 15. 





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Fig. 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 



