body elongate-narrow, flattened, parallel sided and rather tapered at the tip. Posterior points of pronotum extended backwards into sharp points. Antennae usually saw-like and inserted close to the eyes; head deeply inserted into the pronotum. Tarsi 5-5-5. front of body loosely joins back of body and can be moved. .Larvae are long and narrow, brown in colour, with a hard compact body.