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PROCEEDINGS OF THE NATIONAL MUSEUM 



Figure 3. — Distribution in the United States of: Boihynus relictus (Say) (©); B. subtropicus 

 (Blatchley) (■); B. sallaei (Bates) (A); B. selanderi Cartwright (*). 



the entire group is undertaken. The gibbosus group is usually mixed 

 and partly misidentified in most collections. Oxygrylius ruginasus 

 (LeConte) and 0. peninsularis Casey with similar color, form, punc- 

 tures, pronotal impression, and denticle are frequently included as 

 well. Oxygrylius, however, is easily separated from Bothynus by the 

 clj''peus being produced medially to a single, sharp, upturned tooth, 

 while Bothynus always ends anteriorly in two teeth or denticles. 



Figure 4. — Distribution of Boihynus morio LeConte in the United States. 



