_Experimental hosts._--_Blatta orientalis_, _Blattella germanica_, _Leucophaea maderae_, France (Brumpt, 1931). * =Protospirura columbiana= Cram, 1926 _Experimental host._--_Blattella germanica_, U.S.A. (Cram, 1926). * =Protospirura muricola= Geodoelst, 1916 _Natural host._--_Leucophaea maderae_, Panama (Foster and Johnson, 1938, 1939). * =Seurocyrnea colini= (Cram, 1927) Cram, 1931 _Experimental host._--_Blattella germanica_, U.S.A. (Cram, 1931, 1931a, 1933a). * =Spirura gastrophila= (Müller, 1894) Seurat, 1913 _Natural hosts._--_Blatta orientalis_, Europe? (Deslongchamps, 1824, _in_ Seurat, 1911); Italy (Grassi, 1888); Algeria (Seurat, 1916). _Periplaneta americana_, Brazil (Pessôa and Corrêa, 1929). Cockroach, Venezuela (Tejera, 1926). _Experimental hosts._--_Blatta orientalis_, France (Galeb, 1878a); "Cafards," Algeria (Roger, 1906, 1907). * =Tetrameres americana= Cram, 1927 _Natural host._--_Blattella germanica_, U.S.A. (Cram, 1931b, personal communication, 1956); Hawaii (Alicata, 1938, 1947). _Experimental host._--_Blattella germanica_, U.S.A. (Cram, 1931b). * =Tetrameres pattersoni= Cram, 1933 _Experimental host._--_Blattella germanica_, U.S.A. (Cram, 1933). Family PHYSALOPTERIDAE * =Physaloptera hispida= Schell, 1950 _Experimental host._--_Blattella germanica_, U.S.A. (Schell, 1952, 1952a). * =Physaloptera maxillaris= Molin, 1860 _Experimental host._--_Blattella germanica_, U.S.A. (Hobmaier, 1941). * =Physaloptera praeputialis= von Linstow, 1889 _Experimental host._--_Blattella germanica_, U.S.A. (Petri and Ameel, 1950). * =Physaloptera rara= Hall and Wigdor, 1918 _Experimental host._--_Blattella germanica_, U.S.A. (Petri and Ameel, 1950; Petri, 1950). * =Physaloptera turgida= Rudolphi, 1819 _Experimental host._--_Blattella germanica_, U.S.A. (Alicata, 1937; Schell, 1952). HELMINTHS WHOSE EGGS HAVE BEEN CARRIED BY COCKROACHES The use of the asterisk (*) is explained in footnote 3, page 4. Phylum PLATYHELMINTHES Class TREMATODA Order DIGENEA Family SCHISTOSOMATIDAE * =Schistosoma haematobium= (Bilharz, 1852) Weinland, 1858 _Experimental vector._--_Periplaneta americana_, Gold Coast Colony (Macfie, 1922). Class CESTODA Order TAENIOIDEA Family HYMENOLEPIDIDAE * =Hymenolepis= sp. _Natural vectors._--_Periplaneta americana_, Formosa (Morischita and Tsuchimochi, 1926). _Polyphaga saussurei_, Tadzhikistan (Zmeev, 1936). Family TAENIIDAE * =Taenia saginata= Goeze, 1782 _Experimental vector._--_Periplaneta americana_, Gold Coast Colony (Macfie, 1922). =Echinococcus granulosis= (Batsch, 1786) Rudolphi, 1805 _Synonymy._--_Taenia echinococcus_ (Zeder, 1803) [Faust, 1939]. _Experimental vector._--_Periplaneta americana_, Uruguay (Pérez Fontana, 1955): Eggs were recovered from the feces of artificially infested cockroaches under "natural" conditions. Family Unknown * =Undetermined tapeworm ova= _Natural vector._--_Polyphaga saussurei_, Tadzhikistan (Zmeev, 1936).