Tefflus is a genus of large, black and flightless Afrotropical ground beetles in the tribe Panagaeini. They are broadly similar to the Anthiini ('oogpisters'), but are not colourful, and have a six-sided and flattish pronotum. The distinct longitudinal carinae (ridges) on their elytra are separated by two rows of punctures running along the striae (grooves). Males have some segments of the forelegs enlarged.
They are solitary and mostly nocturnal hunters, that move about at a brisk pace. They have strong mandibles that can inflict a serious bite, and prey on a variety of invertebrates. The last revision of the genus was undertaken in 1946.