The BicK.MdTii on Waxwokh 



Table 23. — Effect of humidity on development— conlinued. 



2r 



for the temperature maintained, the work of the larvae was much 

 prolonged. The table shows that in no case did a larva ever reach 

 more than two-thirds normal size when it died. Very quickly after 

 death the larva would become dry and hard. IJsually the larva grew 

 but little in the long period of exposure and a point was reached where 

 growth was not possible and death ensued. 



In table 24 is shown the mean atmospheric humidity prevailing at 

 College Station over the period of months when the experiment was 

 conducted. Compared with this is the mean humidity of the incubator 

 where the experiments were conducted. 



