THE TERRAPIN SCALE. 



11 



Table VII gives, in summary, the history of the isolated scales 

 used in 1912. It shows the ratio between the number of emerged 

 larvae and the total number of embryos produced, but it does not 

 show the date of exhaustion of all the scales. 



Table VIII gives the detailed emergence of larvae for 29 isolated 

 females from June 16 to July 15, 1912. At the latter date the scales 

 were nearly all exhausted and 18 of them had dropped. Only 9 

 were able to produce young at the time of removal. The total num- 

 ber emerging was 4,273. Scale No. 21 gave 349, the highest number 

 of larvae produced by any of these scales. 



Table VIII. — Daily emergence of larvse from the 29 isolated females of the terrapin scale 

 in Table VII, Mont Alto, Pa., 1912. 



No. 









June, 



1912. 

















15 



16 



17 



18 



19 



20 



21 



22 



23 



24 



25 



26 



27 



2S 



29 



30 



1 







1 

 1 



37 





4 

 21 



4 

 33 

 21 



8 

 34 



7 



8 

 30 

 45 



1 

 46 



9 

 39 









3 



6 



28 



4 



12 



17 



44 



5 



7 



4 



9 



1 



10 

 8 

 3 

 7 



10 

 6 

 5 



15 

 7 



12 



3 



20 

 20 



9 

 30 

 12 



6 



8 

 20 

 14 

 24 



1 

 14 

 17 

 11 

 14 

 13 









2 







...... 



6 



3 



7 



4 



5 



12 



18 



2 



9 



3 



11 



11 



7 



20 



16 



24 



2 



13 



4 



6 



15 



1 

 6 

 25 

 9 



18 

 10 

 13 

 8 

 5 

 10 



17 

 26 

 26 

 16 

 29 



1 



1 

 24 

 12 



3 





3 













4 









33 



22 



2 



37 



44 





8 



5 









3 



6...... 







1 



4 

 4 





71. 





2 

 3 





8 



» 



6 

 6 

 3 

 9 



18 

 12 



1 

 1 





9 







10 









62 

 110 







11 





2 



3 



24 



1 





12 







13... 







2 



50 

 5 





10 



if/ 



2 



..... 



11 



8 

 26 



"ii" 



"4" 

 4 



11 

 5 

 3 



19 



16 



20 



9 



4 



4 



11 



27 



9 



9 



1 



3 



12 

 8 



5 

 20 

 14 



3 



5 



14 



1 







14... 











15 











3 





16 







1 









17 













1 

 7 



13 

 4 



22 



8 

 15 



20 

 26 



13 

 10 



"2i" 



10 

 2 



2 



18... 







1 



6 









19 









15 





20 







1 

 4 







6 



18 



12 

 20 



6 

 13 



1 



14 

 14 



2 





21 





2 



80 





48 





22 









23 2 

















1 



4 



39 



15' 















243... 

















""iiT 



1 

 5 



15 



8 



21 



..... 



6 



1 



15 

 1 



7 

 8 

 8 



2 

 20 



2 

 15 

 16 

 30 



8 

 13 



7 

 25 

 11 



6 









25* 







1 



32 



2 



32 



11 



1 

 8 

 14 



24 



4 



10 



7 



2 



26 









27 









14 





16 





28 









19 



30 



3 



10 



1 



29. . 















5 







9 













261 









Total 





24 



534 



2 



421 



164 



202 



296 



194 



368 



229 



295 



91 



21 









1 Dropped June 26. 



2 Hyperaspis binntaia larva emerged June 24; scale dropped June 25. 

 s Loose and removed for dissection July 8. 



* Loose and removed lor dissection July 6. 



