il. 77, Bureau of Entomology U S D 



Plate IX. 





Shelter Conditions Producing Average Survival at Dallas, Tex 



l June L6. L90 



Fig. L.— Section s . started October 30, 1906; emergen 



-Section 5, started Novembers, 1906; emergence ceased Maj L5, L90 



cent. Pig 



12.22 per cent. Fig. 3.— Section 3, s 



survival. ] i.Ti per cent. < Original. ) 



u\ ival, 8.85 i" r 

 sun ival, 



3 started November 12, 1906; emergence ceased May 21, 1907 



