Explanation of Names
Chaetocnema Stephens 1831
Numbers
~60 spp. in our area, ~450 total
(1)Identification
Middle and hind tibiae with a blunt projection or tooth in the apical half, followed by an emargination. Among NA flea beetles, only
Blepharida has similar tibiae (otherwise looks different).
Species ID usually impossible from photos.
Key to 5 spp. found in se. Canada in
(2)
Habitat
open habitats; larvae subterranean
Food
hosts include plants of many families; in our area, Poaceae, Cyperaceae, Chenopodiaceae, Convolvulaceae, Combretaceae, Polygonaceae, and Malvaceae
larvae feed on underground parts
Remarks
commercial pests:
C. confinis (Sweetpotato Flea Beetle),
C. denticulata (Toothed Flea Beetle),
C. ectypa (Desert Corn Flea Beetle),
C. pulicaria (Corn Flea Beetle)
(2),
C. repens (Dichondra Flea Beetle)
(3)