Michigan.—Common in oak-dune and beech-maple forests; under loose bark on dead trees and fallen logs and under debris on forest floor (Hubbell, 1922). Restricted to woodlands, where it inhabited piles of moist dead leaves and rotten logs in oak-hickory forest (Cantrall, 1943).
Texas.—Captured in molasses traps in moist woods of maple, oak, and pine with much undergrowth and a heavy layer of duff; in open, rather dry woodlot of Spanish oak and other trees; and in low wet woods of willow and oak along creek (Hebard, 1943a).
Parcoblatta zebra
Indiana.—Beneath log in cypress swamp (Blatchley, 1920).
Louisiana and Mississippi.—In decay cavity in sweet gum; under sign on shortleaf pine (Hebard, 1917).
Parcoblatta spp.
Alabama.—In the dry wall of a sweet-gum stump together with serropalpid and tenebrionid beetles (Snow, 1958).
Ohio.—Oöthecae under loose bark of fallen trees, where as many as 184 oöthecae were found within a few feet of each other; others found under boards and in piles of firewood (Edmunds, 1952).
Pelmatosilpha coriacea
Puerto Rico.—Mona Island, under bark of dead trees and under guava leaves (Ramos, 1946). Under bark of Sideroxylon foetidissimum (Wolcott, 1941). Common along the coast and in mountains. "Very much at home" under the loose bark of Sideroxylon foetidissimum (Wolcott, 1950).