_U.S.S.R._--In the steppe belt, it is a very characteristic member of feather-grass steppes, where it is found in associations of typically steppe vegetation, with feather grasses at the head (_Stipa lessingiana_ and others), and on rocky slopes; it occurs frequently in cultivated fields of young crops and also in young geological strata in sections with virgin soil. The populations of this steppe cockroach average 6 to 8 individuals per square meter from the middle to the end of July. By the end of summer most individuals were observed at the bases of straw stacks with a canopy, having their south sides sheltered. This is the only species of _Ectobius_ adapted to a purely steppe biocenose. (Bei-Bienko, 1950.) =Ectobius lapponicus= _Southeastern Europe._--Numerous under stones on Trebovic (Burr, 1898). _U.S.S.R._--Found in wooded communities and peat bogs (in northern part of its range); males occur predominantly on herbaceous plants and bushes, but females hide under fallen leaves, moss, etc. (Bei-Bienko, 1950). It populated about 25 percent of the aspen trees in an experimental plot, feeding in galleries in the bark of young branches; there were 25 or more individuals per tree (Stark _in_ Bei-Bienko, 1950). _Germany._--Abundant in woods; in pine woods in company with _Stenobothrus vagans_ and _Tettix kraussi_. Numerous in low aspen bushes in forest. Numerous in deciduous and coniferous forests on trees and underbrush; under fallen leaves and moss; on oaks (Zacher, 1917). In foliage of young oak on top of mountain (Ramme, 1923). _Great Britain._--Under moss and dry leaves, among woodland undergrowth, and, generally, on vegetation close to the ground; occasional on bushes and trees (Lucas, 1920). Nymphs in heather in February and later; adults among rushes fringing pond in July (Lucas, 1925). Nymphs and males on rushy vegetation; unusually abundant on low herbage in dried-up swamp (Lucas, 1930). =Ectobius nicaeensis= _France._--In dry woods, on bushes, and at the base of trees (Chopard, 1947). =Ectobius pallidus= _Algeria._--Under stones; in moist places that are shaded and covered with plants (Lucas, 1849). _England._--Very abundant on sand dunes and among bracken in July (Buxton, 1914). _Germany._--In deciduous and coniferous forests; at edge of forest, from bare woods and bushes; numerous under leaves in oak woods and under moss (Zacher, 1917). In forest well lighted by the sun (Ramme, 1923). _Massachusetts._--Under loose lichens and bark on oak trees; under boxes, baskets, paper, etc., near houses; on Swiss chard (Flint, 1951). On roofs of houses, in shrubbery (Gurney, 1953). We have collected this species for several summers in a fairly dense, wooded area near dwellings, among fallen leaves and climbing on the erect stems and undersides of the leaves of periwinkle. Oöthecae were found on the ground under leaves and debris. =Ectobius panzeri=