77, Bureau of Entomology, U S. Dept. of Agricultt 



Plate IX. 



Shelter Conditions Producing Average Survival at Dallas, Tex. 



Fig. 1.— Section 8, started October 30, 1906; eniersenee ceased June 15, 1907: survival 8 «.=> per 

 cent. Fig. 2.— Section .3, started November F,, lyoc; emergence ceased Mav 15. 1907- 'survival 

 12.^2 per cent. Fig. 3.— Section 3, started November 12, 1906; emergence ceased Mav 21 1907- 

 survival, 14.74 per cent. (Original.) . ■ v^i. 



