VOL. XIIV, NO. 524 



AUGUST, 1910 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 Devoted to the Advancement of the Biologioal Science! with 

 Special Reference to the Factors of Evolution 



Knowledge of Wasps: Pre 



THE SCIENCE PRESS 

 LANCASTER, PA. GARRISON, N. T- 



NEW YORK : SUB-STATION 84 



