Formosa.—Lives among fallen leaves on the ground (Takahashi, 1924).
North-central U.S.—Reported living outdoors near buildings and in soil under basementless buildings from early summer to late fall (Shuyler, 1956).
Blattella humbertiana
India.—Common among decaying vegetation and on trees (Chopard and Chatterjee, 1937).
Formosa.—Normally found in sugarcane fields, pineapple fields, and grasslands where it feeds on decayed leaves and other decayed vegetable matter and dead insects. It lies concealed among and under fallen leaves and clods of earth on or close to ground and never on the upper parts of plants, except pineapple where it is found among the leaves (Takahashi, 1940).
Blattella vaga
Arizona.—Typically an inhabitant of irrigated fields and yards, it is found in fewer numbers on the dry desert. It is found under stones, plant debris, and clumps of earth; found in greatest numbers around decaying dates on ground (Flock, 1941a).
Texas.—Beneath duff under athel trees; rather abundant in clumps of Rhodes grass (Riherd, 1953).