The head and abdomen are dark brown. The pronotum is considerably lighter in color, usually grayish or yellowish brown. The legs are whitish, with a dark ring around the femur. The cerci are moderately long, and not strongly curved. Normally, five instars are found, but six are observed occasionally.
Instars are difficult to distinguish and no single character is completely diagnostic.
The number of antennal segments is most useful, though this is mostly effective among the early instars. The adults are dark brown in color, and wingless. They measure 12 to16 mm in length, with females averaging slightly larger than males. The legs are pale, usually with a dark band around the middle of the femur, and often tibia, of each leg. Adults generally bear 16 antennal segments.