Streams, bryophytes, insects: all these have been studied by many authors, but few have studied the interrelationships of the three in depth. (Thienemann, 1912; Carpenter, 1928; Percival and Whitehead, 1929, 1930; Illies, 1952; and Minckley, 1963, all included mosses in their discussion of stream surveys.) Moreover, even fewer workers have attempted to determine the relationships among insect communities associated with bryophytes in different streams or among several species of bryophytes. Only Frost (1942) compared the fauna of mosses in an acid and an alkaline stream, but she did not separate the moss species in her analysis. Thus, the present study appears to be the first attempt to compare the bryophyte fauna of streams of the Appalachian Mountains in the Deciduous Forest Formation (Braun, 1964).