VOt. XLIII, HO. 509 



MAT, 1909 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 



Devoted to the Advancement of the Biological Sciences with 

 Special Reference to the Factors of Evolution 



CONTENTS 



I. The Categories of Variation. Professor S. J. HOLMES 



IL The General Entomological Ecology of the Indian Corn Plant . 



in. Notes and Literatures : Biometrics— Some Recent Studies on Growth. DR. Ray- 

 mond Pearl. Experimental Zoology— Cuenot on the Honey-bee, Professor 

 T. H. Morgan. The Upholding of Darwinr- Poulton and Plate on Evolution 



THE SCIENCE PRESS 

 LANCASTER, PA, GARRISON, N. Y. 



NEW YORK : SUB-STATION 84 



