Although little to nothing is known of their biology, several small cockroaches have a heavy pronotum and exhibit the elongated, cylindrical body form typical of many wood-boring beetles (Cymorek, 1968). Their appearance suggests that these cockroaches drill into solid wood or
soil because the shape minimizes cross-sectional area, reducing the tunnel bore and the force required to advance a given body weight. This morphotype is exhibited by the genus Colapteroblatta (Epilamprinae) (Roth, 1998a), as well as some species of Perisphaeriinae in the genera Compsagis, Cyrtotria, Bantua, and Pilema (Shelford, 1908; Roth, 1973c). Compsagis lesnei typifies this type of cockroach (Fig. 1.14) and is a small (9.5 mm in length) African species found inside of tree branches (Chopard, 1952).
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