Definition and Revision of the Atomarius Species-Group of North American Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae), Including Descriptions of Nine New Species Barney, Robert J. The Coleopterists Bulletin 2018 2018-03-23 72 1 9 74   17. Body yellow-orange and black, pronotal M not distinct; arrowhead-shaped distal end of median lobe very large (AAW> 0.16 mm), narrowing at apicolateral margin to form a lateral ridge ( Fig. 14)....... 14.  P. mcmeansiBarney, new species