. Cooperative economic insect report. Beneficial insects; Insect pests. FLEA BEETLES OF THE GENUS CHAETOCNEMA (CHRYSOMELIDAE) Four of the 30 species in North America are injurious to various crops, with corn, sorghums, and small grains most frequently damaged. These four species are the sweetpotato flea beetle, C. confinis Crotch, the toothed flea beetle, C. denticu- lata (Illiger), the deserT corn flea beetle, C. ectypa Horn, and the c'orn flea beetle, C. pulicaria Melsheimer. Larvae of these beetles feed on roots of the host plant, and the adults chew small holes in the leaves. Some species
. Cooperative economic insect report. Beneficial insects; Insect pests. FLEA BEETLES OF THE GENUS CHAETOCNEMA (CHRYSOMELIDAE) Four of the 30 species in North America are injurious to various crops, with corn, sorghums, and small grains most frequently damaged. These four species are the sweetpotato flea beetle, C. confinis Crotch, the toothed flea beetle, C. denticu- lata (Illiger), the deserT corn flea beetle, C. ectypa Horn, and the c'orn flea beetle, C. pulicaria Melsheimer. Larvae of these beetles feed on roots of the host plant, and the adults chew small holes in the leaves. Some species of these beetles disseminate the bacterium causing Stewart's disease of corn. A combination of characters is diagnostic for members of this genus. They are dark colored, jumping beetles to ram. long. The Chaetocnema are the only North American flea beetles of this size with the elytral punctures in distinct rows (at least laterally) and with the apex of the hind tibiae broadly notched and with a comb of bristles (see below). The tiny figure below the lateral view equals actual size. Richard E. White Entomology Research Division Agr, Res. Serv., USDA c/o National Museum Washington, 20560. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Animal and Plant Health Service. Plant Protection and Quarantine Programs; United States. Bureau of Entomology and Plant Quarantine; United States. Plant Pest Control Division. Hyattsville, MD. [etc. ] Plant Protection and Quarantine Programs Animal and Plant Health Service
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