Therea is a genus of crepuscular cockroach found in South, East and Central India and in Sri Lanka. Its species are found on the ground or at low levels in vegetation in lowland and foothill forests and woodlands that vary from dry to semi-humid. Adults are generally 1.5–2.8 cm (0.6–1.1 in) long and black with contrasting markings in whitish or orange (depending on species). The genus includes some species that are popular as pets.

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