Chalepus walshii (Crotch)

Eiseman, Charles S., 2014, New Host Records and Other Notes on North American Leaf-Mining Chrysomelidae (Coleoptera), The Coleopterists Bulletin 68 (3), pp. 351-359: 353

publication ID 10.1649/072.068.0302

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Chalepus walshii (Crotch)


Chalepus walshii (Crotch)  

Apparently, the only documented larval hosts of this species are Elymus villosus Muhl. ex Willd.   and E. hystrix   L. ( Poaceae   ), with no notes on the larval habits (Ford and Cavey 1985). I have yet to find any leaf mines, but the conspicuous and distinctive feeding damage caused by the adults is worth mentioning. They scrape the leaf surface in regular, approximately 3-mm 2 patches, which soon turn whitish and give the leaf a checkered appearance ( Fig. 5). I have found the beetles feeding in this way on Elymus repens   (L.) Gould and Elymus virginicus   L. along the Maine coast and on Calamagrostis canadensis (Michx.) P. Beauv.   ( Poaceae   ) in both Maine and Massachusetts.