It is a Palearctic species found from Europe ranging to Morocco in the south and eastern Asia in the east.

Subbasal and prediscal bands approach each other costally and are united at the hind margin.

[now full species Clostera obscurior (Staudinger, 1887)], with the ground-colour very deep dark brown, is found in Central and East Asia; and ferruginea Stgr., with the ground bright rust-brown, has been described from southern Asia Minor.

Larva ashy grey to blackish grey, or with a greenish tint, hair grey-yellow, the hump on segments 1 and 8 of abdomen flat, black; 2 longitudinal rows of yellow lateral small warts in dark spots, also a ventro-la teral, yellow, interrupted double stripe, in which the black spiracles are placed.

Pupa glossy red-brown with dark wing-cases, in a whitish grey web.