A slim, flat, 6-11 mm-long beetle, dark brown to black; ventral side, antennae and legs are red-brown. A particular feature is the waisting between wing covers and neck shield, whose outer front corners extend toward the head.
A serious pest in the tropics, found in mills, silos, and warehouses, on grain, mill products, and feeds. Irregular borings are found in kernels; germs are preferred.
The dirty-white larva, has a black head, behind this a black shield, two black hooks at the end of the body and long body hairs.