COCKROACHES IN WHICH BACTEROIDS HAVE BEEN FOUND _Bantua stigmosa._ Fraenkel (1921) _Blaberus craniifer._ Brooks (1954); Brues and Dunn (1945); Hoover (1945). _Blaberus giganteus._ Blochmann (1892). _Blatta orientalis._ Blochmann (1887, 1888, 1892); Bode (1936); Brooks (1954); Buchner (1912); Cuénot (1896); Fraenkel (1921); Frank (1955, 1956); Gier (1936, 1947); Glaser (1920); Gropengiesser (1925); Gubler (1948); Heymons (1895); Hollande and Favre (1931); Hoover (1945); Hovasse (1930); Javelly (1914); Keller (1950); Koch (1949); Menel (1907)?; Mercier (1906a, 1907, 1907b, 1907c); Ries (1932); Ronzoni (1949); Tacchini (1946); Wolf (1924, 1924a). _Blattella germanica._ Blochmann (1887, 1888, 1892); Bode (1936); Borghese (1946, 1948, 1948a); Brooks (1954); Brooks and Richards (1954, 1955, 1955a, 1956); Fraenkel (1921); Gier (1936, 1947); Glaser (1920, 1930a); Gropengiesser (1925); Haller (1955, 1955a); Heymons (1892, 1895); Hoover (1945); Koch (1949); Lwoff (1923); Milovidov (1928); Neukomm (1927, 1927a, 1932); Pérez Silva (1954, 1954a); Ries (1932); Rizki (1954); Ronzoni (1949); Tacchini (1946); Wollman (1926); Yetwin (1932, 1953). _Cryptocercus punctulatus._ Gier (1936, 1947); Hoover (1945). _Derocalymma cruralis._ Fraenkel (1921). _Ectobius lapponicus._ Heymons (1892); Cuénot (1896); Koch (1949). _Ectobius pallidus._ Heymons (1892, 1895); Cuénot (1896). _Epilampra grisea._ Fraenkel (1921). _Eurycotis floridana._ Gier (1936, 1947). _Loboptera decipiens._ Buchner (1930). _Nauphoeta cinerea._ Fraenkel (1921). _Nyctibora noctivaga._ Gier (1947). _Parcoblatta lata._ Gier (1936, 1947). _Parcoblatta pensylvanica._ Brooks (1954); Gier (1936, 1947). _Parcoblatta uhleriana._ Gier (1936, 1947); Hoover (1945). _Parcoblatta virginica._ Glaser (1920); Gier (1947). _Periplaneta americana._ Baudisch (1956); Bode (1936); Cuénot (1896); Gier (1936, 1937, 1947); Glaser (1920, 1930, 1946); Gubler (1948); Hertig (1921); Hoover (1945); Ketchel and Williams (1953). _Periplaneta australasiae._ Gier (1936, 1947); Koch (1949). _Platyzosteria armata._ Fraenkel (1921). _Polyphaga aegyptiaca._ Fraenkel (1921). _Pseudoderopeltis aethiopica._ Fraenkel (1921). _Pycnoscelus surinamensis._ Bode (1936); Koch (1949). _Supella supellectilium._ Brooks (1954). BACTERIA Evidence showing that intestinal bacteria contribute to the nutrition of cockroaches is meager. Cleveland et al. (1934) isolated a bacterial organism from the foregut of the wood-feeding cockroach _Panesthia angustipennis_. The bacterium digested cellulose rapidly in vitro and these workers believe that this cockroach and other related wood-feeding species are dependent on symbiotic bacteria for the digestion of their food.