112 THE AMERICAN NATURALIST. [Vol. XXXVII. 



show more plainly a systematic arrangement which appears 

 natural and logical. It is not carried out to all the genera as 

 established and recognized by Simpson, but only to groups 

 showing characteristic, distinctive features. Again it may be 

 pointed out that Proptera, possibly with an additional genus, 

 might be regarded as representing a third (*. e., the second) 

 main division. 



