12 



BULLETIN 351, U. S. DEPARTMENT OF AGRICULTURE. 



Table VIII. — Daily emergency of larvae from the 29 isolated females of the terrapin scale 

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



No. 



July, 1912. 



To- 



l 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



15 



tal. 



1 



30 

 2 



33 

 7 



21 



23 



14 

 10 

 14 

 1 

 3 

 2 



11 



4 

 2 

 7 

 6 

 5 



9 





19 



3 



6 

















142. 



2 

















121 



3 



2 



1 



1 





11 



3 













5 



189 



4 













214 



5 



10 

 3 





8 



7 



1 

 3 



11 



4 



3 

 1 



5 











8 



245 



6 







1 





189 















152 



8 





4 

 2 











2 



















137 



9 



9 



2 



3 





8 



7 





1 











1 



119 



10 











143 



11 



6 



5 





2 





6 



2 



















303 



12 



















3 



13 





1 

 2 



14 





























116 



14 















1 



9 

















8.8 



15 



43 



5 



10 





9 



3 



4 



2 



4 



2 







1 



220 



16 







11 



17 



28 

 17 



6 



7 



5 



4 



2 

 2 





3 



7 



5 

 1 



9 

 3 



..... 



1 



1 

 2 









2 

 3 



124 



18 





2 





168 



19 



71 



20 



36 

 28 

 2 



17 



11 

 3 



3 



5 



9 

 5 

 3 



..... 



24 

 3 

 9 



5 

 ..... 



7 

 11 

 6 



7 

 6 

 4 



4 



3 

 3 

 2 



4 

 1 







3 



187 



21 







349 



22 







3 



45 



232 









1 



24' 



2 

 13 

 31 

 23 



7 

 19 















17 

















42 



25* 



4 

 12 



3 

 14 



6 



2 

 5 

 4 

 3 

 4 



4 



15 

 4 

 2 

 3 



19 

 21 



6 

 13 



3 

 6 

 2 



















292 



26 



9 



21 



8 



5 



2 











144 



27 











151 



28 



3 



7 

 2 



4 



2 



3 



4 







5 



153 



29 







125 





42 

















Total 



380 



155 



77 



88 



134 



48 



132 



20 



21 



11 



3 





31 



4,273 



1 Dropped June 26. 



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



3 Loose and removed for dissection July 8. 



4 Loose and removed for dissection July 6. 



The weather was abnormal during the emergence period of 1912. 

 It was very cold, with a daily maximum below 70° F. from June 13 

 to 15, inclusive. June 19 was rainy and cold, with the daily maxi- 

 mum below 60° F. The daily maximum did not go above 70° until 

 June 22, when it rained. From June 24 to 28, inclusive, the weather 

 was favorable, except for local showers on June 25 and 27. June 29 

 and 30 were unfavorable, due to a cold rain and no sun. July 5 also 

 was a rainy day. The only favorable weather was from July 6 to 1 1 , 

 inclusive, but it was too late to have an appreciable effect. 



The dotted curve on the following emergence graph, figure 2, 

 shows clearly the effect of these weather conditions. The solid line 

 shows the curve as it would probably be in favorable weather. 



During 1913 a few larvae appeared in the brood chambers at Mont 

 Alto, Pa., on June 11. The larvae were quite abundant in the brood 

 chambers on June 12, and emergence started June 13. Thus the 

 interval between first birth and first emergence was 2 days. The 

 emergence from the isolated scales also started June 13 and the 

 maximum daily emergence was June 18. Fifty per cent and the 75 



