14 



BULLETIN 351, U. S. DEPARTMENT OF AGRICULTURE. 



Table IX. — The emergence from 41 isolated females of the terrapin scale during the emer- 

 gence period of 1913. Mont Alto, Pa. 



No. 



Total 

 larvae. 



Last 



larva 



emerged. 



Parent 



scale 



turned 



black. 



Knocked 



off by 

 accident. 



Scale 

 loosened. 



Scale 

 dropped. 



Scale 

 dead. 



1 



204 

 76 

 494 

 206 

 209 

 233 

 421 

 708 

 458 

 796 

 245 

 663 

 221 

 165 

 53 

 387 

 3S9 

 192 

 174 

 94 

 394 

 130 

 240 

 114 

 9 

 389 

 267 

 654 

 472 

 309 

 196 

 42 

 76 

 121 

 98 

 464 

 373 

 433 

 391 

 657 

 119 



July 14 

 July 1 

 Aug. 7 

 July 4 

 June 29 

 Aug. 30 

 Aug. 26 

 Sept. 19 

 July 20 

 Aug. 30 

 June 30 

 Sept. 30 

 July 7 

 June 28 

 June 22 

 July" 21 

 July 7 

 July 2 

 June 29 

 June 24 

 July 5 











July 14 

 July 21 



2 









July 21 



3 , 





Aug. 27 





4 





July 4 



July 4 

 July 10 

 Sept. 30 

 Sept. 2 

 Sept. 30 

 Aug. 15 

 Sept. 2 

 July 31 

 Oct. 11 

 Aug. 1 

 June 28 



July 11 

 June 30 



5 







6 



Sept. 5 

 ...do 







Sept. 1 

 Aug. 28 

 Sept. 20 

 July 2 









8 









9 









10... 





Sept. 2 



Sept. 1 



11 i 





July 1 



12 









Oct. 11 



132 









July 8 



14 







June 22 

 ...do 



15 





June 22 





163 









Aug. 7 

 Aug. 1 

 July 18 

 July 1 

 June 22 



174 









Aug. 1 

 July 18 

 July 1 

 July 21 

 July 18 

 July 11 

 July 18 



18& 









19 









2067 



June 15 







218 







July 18 

 July 6 

 July 7 



22 









23 



July 6 

 June 20 

 June 19 

 July 10 

 June 28 

 Aug. 18 

 Aug. 14 

 Aug. 1 

 July 3 

 June 29 

 Julv 2 

 June 23 

 June 28 

 Aug. 7 

 Julv 14 

 Julv 26 

 July 6 

 Sept. 19 

 July 21 









24 





June 22 





25 





June 21 



June 22 .Time 22 



2G 







July 11 

 June 29 



July 11 

 June 29 



27 









28 





Aug. 23 







299 









Aug. 27 

 Aug. 2 

 Aug. 1 

 July 1 

 July 3 



30 









Oct. 11 



Aug. 18 

 July 1 



3im r 









32 









33 









34 





June 23 







35 







June 28 1 .Tuna 28 



36 











Aug. 27 

 July 15 

 Aug. 11 

 July 17 

 Sept. 20 

 July 22 



37 











38.... 









Aug. 11 

 Aug. 18 



39 









40 









41 









Aug. 23 













Total 



12, 336 









i First instar Hypcraspis binotata emerged from this scale July 1. 



2 First instar Hypcraspis binotata emerged from this scale July 14. 



3 One hymenopterous parasite ( Coccophagus sp.) emerged from this scale Aug. 7. 



4 Two hymenopterous parasites ( Coccophagus "sp.) emerged from this scale July 16. 



5 Seven hymenopterous parasites ( Coccophagus sp.) emerged from this scale July 13. 



6 First instar Hypcraspis binotata emerged from this scale July 5. 



i Three hymenopterous parasites ( Coccophagus sp.) emerged from this scale July 13. 

 s Second instar Hypcraspis binotata emerged from this scale July 18. 

 9 First instar Hypcraspis binotata emerged from this scale July 18. 

 i° First instar Hyperaspis binotata emerged from this scale June 30. 



The emergence started June 13 with 18 larvae; the maximum 

 daily emergence occurred upon June 18, when 1,229 larvae emerged. 

 This was 5 days after emergence had started. The first half of the 

 brood (6,168 larvae) completed its emergence upon June 23. This 

 was the tenth day of emergence. Seventy-five per cent of the brood 

 (9,250 larvae) had emerged by June 30. This was upon the seven- 

 teenth day of emergence. The daily emergence was not taken for 

 the entire period of 1913, but data for the first 22 days, which cover 

 slightly more than three-fourths of the total emergence, are given 

 in Table X. 



Table XI supplements Table X. It carries the emergence through 

 the entire period by weeks. It also gives the date of the end of 

 emergence for each of the parent scales. 



