2/2 G. T. CALDWELL. 



decrease in carbon dioxide production, which falls below normal 

 before the vital limit is reached. 



4. The larvae of Alypia octomacitlata Fabricius show a decrease 

 in carbon dioxide production in all stages of desiccation. 



5. Xerophilous animals give up water more slowly and in 

 proportion to water losses are more stimulated by dry air than 

 hygrophilous animals. 



6. Water starvation increases the depression of metabolic 

 activity caused by food starvation. 



7. Extremely dry air is a protoplasmic irritant. 



VII. BIBLIOGRAPHY 

 Allen, G. D. 



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Babcock, S. M. 



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* Baker. 



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 Bodine, J. H. 



'21 Factors Influencing the Water Content and the Rate of Metabolism of 



Certain Orthoptera. Jour. Exp. Zool., Vol. 32, p. 137. 

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other Substances on the Production of Carbon Dioxide by Certain 



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* Doyere, 



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