_Costa Rica._--Among humus and rubble in crevices and large cavities in rocks of the Tertiary limestone rim and the metamorphosed and igneous rocks of the interior of the islands (Baker _in_ Rehn, 1930). =Supella supellectilium= _Virgin Islands, St. Croix._--Under rubbish heaps; in sugarcane straw (Beatty, 1944). _Africa._--"A cosmotropical species which occurs both out of doors and as a household pest in many warmer parts of the world. It is apparently endemic to non-forested areas in much of Africa north of the Equator." (Kevan and Chopard, 1954.) =Symploce flagellata= _Puerto Rico._--Under low trees on hillside and dead leaves in thicket of sea grape (Hebard, 1916c). =Symploce hospes= _Hawaii._--Under stones and rubbish (Illingworth, 1915). _Virgin Islands, St. Croix._--Under rubbish and on shrubbery at night (Beatty, 1944). =Symploce jamaicana= _Jamaica._--In dead leaves under acacia and other shrubs in desert tract; under log and rubbish in open on limestone sand near beach (Hebard, 1916c). Very common in short dry grass in roadside gutter at night, often clustered together; under beach trash in stony wash of Hope River (Rehn and Hebard, 1927). =Symploce ruficollis= _Virgin Islands, St. Croix._--Under rubbish and on shrubbery at night (Beatty, 1944). _Puerto Rico._--In siftings from sea-grape thicket on sandy soil (Rehn and Hebard, 1927). Often living under leaf-sheaths of sugarcane (Wolcott, 1950). =Tartaroblatta karatavica= _Asia, Kara-tau Mountains._--Many hundreds of individuals found only under stones on moist earth and not where ground seemed dry; found on very stony slopes with sparse vegetation, often with undergrowth present (Bei-Bienko, 1950). STRUCTURAL HABITATS In this category we include all man-made structures, whether inhabited by man or not, that may become infested with cockroaches. A nonexhaustive list of such structures would include dwellings, restaurants, mess halls, barracks, groceries, markets, bakeries, dairies, drug stores, department stores, hotels, hospitals, warehouses, mills, factories, packing houses, animal houses, breweries, incinerators, privies, sewers, sewage treatment plants, ships, aircraft, etc. Although dwellings are only one of the many kinds of structures that are colonized by cockroaches, the several species that have adopted this mode of life are generally referred to as domiciliary cockroaches. This term is adequate only if we remember that these cockroaches are not restricted to domiciles but are pests in other structures as well.