Bugs such as the June bug and the ground beetle are often mistaken for roaches. There are around 2,000 species of beetles, some of which greatly resemble the common household roach. The best way to tell them apart, is to look at their wings - a roach's wings (when they have them) are much softer than a beetle's wings.
Ground beetles most closely resemble roaches since they are dark in color and typically only come out at night. When closely inspected, however, the beetles appear very different. Also, unlike roaches, beetles do not carry diseases, and they eat pests, such as root maggots, that can damage vegetation.
There are many species of cockroaches and they all have a slightly difference appearance. The most common roaches found in buildings and homes are the American cockroach or the brown-banded cockroach.