House cricket

The house cricket is typically gray or brownish in color, growing to 16–21 millimetres (0.63–0.83 in) in length. Males and females look similar, but females will have an ovipositor emerging from the rear, around 12 millimetres (0.47 in) long. The ovipositor is brown-black, and is surrounded by two appendages. On females, the cerci are also more prominent http://en.wikipedia.org/wiki/Acheta_domesticus