_Blattella germanica_ (Burks, 1943; Peck, 1951). [In personal communications, Burks and Peck cite Howard (1892) and Marlatt (1902, and the 1908 revision of 1902) as sources for this host record. However, _B. germanica_ is not mentioned specifically as a host of _T. hagenowii_ in the sources cited nor in the 1915 revision of Marlatt's 1902 paper cited by Burks (1943); see footnote 6, p. 236.] _Neostylopyga rhombifolia_, Hawaii (Pemberton, 1941): This record is based on one parasitized oötheca. We have exposed, at three different times, groups of 10 to 20 oöthecae of _N. rhombifolia_ to many newly emerged _T. hagenowii_, but none of the eggs was parasitized (Roth and Willis, unpublished data, 1957). _Parcoblatta_ sp., U.S.A., Ohio (Edmunds, 1953a). _Periplaneta americana_, Africa (Crawford, 1910; Nash, 1955): Nash's record was incorrectly attributed to _Syntomosphyrum glossinae_ Wtstn., a parasite of tse-tse fly pupae (Jordan, 1956), Formosa (Takahashi, 1924; Sonan, 1924); Palestine (Bodenheimer, 1930); Puerto Rico (Seín, 1923; Plank, 1947, 1950; Wolcott, 1951); St. Croix, Virgin Islands (Beatty, 1944); Hawaii (Schmidt, 1937); U.S.A.: Missouri (Rau, 1940a); Ohio (Edmunds, 1955); Florida (parasitized oöthecae were collected near Orlando by members of the Orlando Laboratory, Entomology Research Branch, U.S. Department of Agriculture; the parasites were identified by Burks, personal communication, 1955). Fiji (Lever, 1943); India (Mani, 1936; Usman, 1949); Trinidad and Saudi Arabia (Cameron, 1955). Westwood (1839) stated that 70 parasites belonging to the genus _Eulophus_ emerged from an oötheca of _P. americana_ collected on shipboard. Burks (personal communication, 1955) stated that the wasp was probably _T. hagenowii_. _Periplaneta australasiae_, Australia (Shaw, 1925); India (Usman, 1949); Saudi Arabia, Trinidad (Cameron, 1955); Formosa (Sonan, 1924). _Periplaneta brunnea_, U.S.A., Florida (parasitized oöthecae were collected near Orlando, by members of the Orlando Laboratory, Entomology Research Branch, U.S. Department of Agriculture. The parasites were identified by Burks, p. c., 1955). Cockroach eggs, Formosa (Maki, 1937); Ceylon (Waterston, 1914): Taken on an oötheca. "Domestic cockroaches," U.S.A., Louisiana (Girault, 1917). "Roach egg cases," Panama Canal Zone (Rau, 1933). _Evania_ sp., Hawaii (Ashmead, 1901; Perkins, 1913); Guam (Fullaway, 1912); Fiji (Lever, 1946); Europe, Cuba, Florida (Marlatt, 1902, 1915). _Experimental hosts._--_Blatta orientalis_, _Eurycotis floridana_, and _Periplaneta americana_, U.S.A. (Roth and Willis, 1954b): We have maintained _T. hagenowii_ for over two years through more than 30 generations on eggs of both _B. orientalis_ and _P. americana_. _Periplaneta fuliginosa_, U.S.A., Pennsylvania (Roth and Willis, 1954b); Massachusetts (Roth and Willis, unpublished data, 1957).