IHE CHEESE SKIPPER AS A PEST IN CURED MEATS 



15 



Table 2. — Oviposition records of Piophila casei on various food materials at 

 Washington, D. C, in 1921 — Continued 



Date 



Date 

 mated 



Day after mating and number 

 of eggs laid 



Long 



evity 



Total 

 eggs 



Remarks 



emerged 



1st 



2d 



3d 



4th 



5th 



6th 



7th 



Male 



Fe- 

 male 



Julv 19 



July 20 

 20 

 22 



Sept. 1 



1 

 1 

 1 

 1 

 1 

 8 

 8 

 8 

 8 

 8 

 8 

 8 

 8 

 15 

 15 

 Oct. 1 

 1 

 1 

 1 



58 

 70 





 73 

 66 

 73 

 66 

 45 

 36 

 54 





 60 

 49 





 60 





 63 

 37 

 66 



51 





 19 

 63 

 63 

 65 





 14 

 60 





 54 











27 



22 













Days 

 8 

 11 

 2 

 10 

 26 

 8 

 5 

 9 

 11 

 14 

 10 



Days 

 8 



11 

 5 

 3 

 4 

 6 

 4 

 2 

 5 



13 

 4 

 5 

 5 

 5 

 4 

 6 

 5 

 3 

 3 



3 7 

 7 



9 



131 

 182 

 19 

 136 

 129 

 152 

 102 

 59 

 96 

 77 

 85 

 84 

 49 

 44 

 76 

 56 

 63 

 68 

 99 

 

 151 

 184 

 85 



On lean ham. 



20 

 22 



44 







41 



Do. 

 Do. 



Sept. 1 













, Do. 















Do. 









36 







14 







Do. 









Do. 













Do. 















Do. 



8 





 



24 



23 



31 









Do. 



8 









Do. 



8 









18 



5 



Do. 



8 











Do. 



8 



44 

 

 37 











— 



14 

 3 



12 

 6 

 3 

 6 



39 

 7 



17 



Do. 



8 





 



16 













Do. 





19 







Do. 



7 







Do. 



15 





 33 



31 











Do. 



15 











Do. 



30 













On lean ham in refrigerator. 



30 



73 



101 

 



78 

 83 



85 















30 













Do. 



30 











13 



Do. 















Table 3 gives the daily mean temperatures in the laboratory during 

 the time the records shown in Table 2 were being made. 



Table 3. — Daily mean temperatures in the laboratory at Washington, D. C, 

 in 1921, during the period when the experiments on Piophila casei shown in 

 Table 2 were made 



[Based on daily average of thermograph readings taken at two-hour intervals] 



1 



Tem- 





Tem- 





Tem- 





Tem- 





Tem- 



Date 



pera- 



Date 



pera- 



Date 



pera- 



Date 



pera- 



Date 



pera- 





ture 





ture 





ture 





ture 





ture 





°F. 





°F 





°F. 





°F. 





°F. 



May 19... 



74 



June 24-.. 



89 



July 30... 



82 



Sept. 4... 



84 



Oct. 10— 



69 



20. -_ 



74 



25.-. 



89 



31... 



85 



O 



82 



11... 



75 



21... 



76 



26-- 



89 



Aug. 1 — . 



78 



6... 



81 



12... 



74 



22— 



80 



27.- 



87 



2— . 



78 



7... 



79 



13..- 



71 



23-. 



82 



28-- 



86 



3... 



80 



8-.. 



79 



14-. 



70 



24... 



72 



29-.- 



86 



4... 



83 



9... 



79 



15-. 



71 



25 — 



67 



30... 



85 



5... 



82 



10-. 



79 



16.-- 



68 



26. .. 



71 



July 1-.. 



82 



6... 



84 



11... 



80 



17-. 



69 



27... 



69 



2.. . 



83 



7-- 



78 



12-.- 



80 



18... 



72 



28... 



74 



3... 



86 



8... 



78 



13- — 



79 



19— 



73 



29... 



76 



4... 



88 



9-.. 



79 



14-- 



76 



20--- 



74 



30... 



76 



5... 



88 



10-- 



75 



15--. 



78 



21... 



70 



31-.. 



74 



6... 



83 



11-.- 



74 



16-- 



77 



22—. 



72 



June 1... 



76 



7... 



84 



12... 



75 



17— 



79 



23..- 



69 



2— 



75 



8... 



88 



13... 



78 



18— 



82 



24... 



71 



3... 



74 



9... 



88 



14... 



82 



19— 



75 



25... 



68 



4... 



78 



10... 



87 



15— 



75 



20-. 



73 



26... 



67 



5— 



74 



11... 



84 



16--. 



73 



21-- 



to 



27... 



70 



6— 



73 



12.- 



81 



17... 



72 



22.- 



76 



28--. 



73 



7--. 



72 



13... 



82 



18-- 



79 



23... 



10 



29-.. 



74 



8... 



72 



14... 



83 



19..- 



79 



24... 



73 



30--- 



68 



9... 



74 



15-- 



82 



20-.. 



80 



25... 



75 



31... 



73 



10.-. 



76 



16-- 



78 



21--- 



81 



26... 



71 



Nov. 1... 



73 



11... 



80 



17... 



80 



22- — 



74 



27... 



69 



2... 



70 



12... 



82 



18..- 



80 



23... 



73 



28... 



74 



3... 



69 



13... 



* 84 



19... 



83 



24... 



73 



29... 



78 



4— . 



69 



• 14... 



82 



20-. 



84 



25... 



73 



30... 



76 



5.-- 



68 



15... 



78 



21... 



81 



26.- 



72 



Oct. 1... 



68 



6--. 



59 



16... 



78 



22-. 



79 



27... 



72 



2... 



67 



7--. 



63 



17... 



82 



23... 



79 



28... 



73 



3... 



68 



8... 



69 



18... 



80 



24... 



81 



29-.- 



80 



4... 



66 



9... 



69 



19... 



79 



25. .. 



.85 



30-. 



84 



5-.. 



67 



10--- 



69 



20... 



78 



26... 



84 



31.- 



85 



6-.- 



69 



11... 



57 



21 — 



81 



27... 



. 86 



Sept. 1 — . 



85 



7 



70 



12... 



64 



22... 



85 



28... 



86 



2... 



85 



8... 



73 



13... 



56 



23... 



88 



29... 



83 



3... 



85 



9... 



61 







