Blattidse, Blattarie

n. pl. (Zool.) The Cockroach family, order Orthoptera. This family contains orthopterous insects which have the body oval, flattened, the hind extremity of the abdomen furnished with conical articulated appendages, and the antennæ long and many jointed. B. are nocturnal, and are found not only in forests, but some species also infest kitchens, store-rooms, and closets, devouring all kinds of provisions, and even fabrics. The genus Blatta contains several species, which are indigenous, and one, B. Oriental is, or black beetle, which is a native of Asia. Blau'veltville, in New York , a post-village of Rock land co., 29 m. N. of New York city. Blaw'enburg, in New Jersey , a post-village of Somerset co., 15 m. N. by E. of Trenton.