PLATE XXIII. 



PLEISTOCENE BEETLES OF FORT RIVER, MASSACHUSETTS. 

 (The origiual drawings are by J. Henry Blake.) 



Fig. 1. Cymindis extorpescens ; elytron f. 



2. Corymbites .nethiops (Herbst)?; prothorax ';. 



3. Dytiscidiusp., perhaps a Matus; metasternum f . 



4. The same ; a portion further enlarged to show the surface sculpture \^. 



5. Donacia elongatula ; elytron '{-. 



6. Saxinis regularis ; portion of the right elytron highly magnified to show the surface sculpture ^. 



7. Tliesavie; dorsal view of the beetle jf. 

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