Any of various freshwater aquatic beetles that have a smooth oval body and flattened hind legs adapted for swimming, and that carry an air bubble underneath their abdomens.

Any of various carnivorous or scavenging beetles of the family Staphylinidae that are often found in decaying matter and have slender bodies and short wing covers.

A beetle, Leptinotarsa decemlineata, formerly Doryphora decemlineata, with black and yellow stripes, that is a serious pest of potatoes.

A bright-red-colored beetle, Pyrochroa serraticornis. / A related species, Pyrochroa coccinea / A more distantly related species, Schizotus pectinicornis

A beetle whose defence mechanism enables it to eject a hot aqueous mixture of chemicals at predators. They come from a number of subfamilies: Carabinae (e.g., Brachinus crepitans), Metriinae (e.g., Stenaptinus insignis) and Paussinae (e.g., Goniotropis nicaraguensis).

Synonym of ladybird.

A large black beetle with a pair of strong mandibles.

(dated, Britain, slang) A large, flat foot.

Any of very many beetles, of the family Scarabaeidae, especially Scarabaeus sacer regarded as sacred by the ancient Egyptians

Any of the American shield bugs, in the superfamily Pentatomoidea.