Natural hosts.—Blatta, "exotic species" (Westwood, 1854, 1954a).
Blatta orientalis, Europe? (Schletterer, 1886; Howard, 1888, Kieffer, 1912); Egypt? (Alfieri, 1914; Adair, 1923). [Girault (1907, 1914) erroneously attributed another record to Marlatt (1902);[6] . See also notes under Brachygaster minutus with respect to Kadocsa.]
Blattella germanica? (Girault 1907, 1914). [This record is obviously an error. Girault attributed the record to Marlatt (1902); see footnote 6.]
Cutilia soror, Hawaii (Swezey, 1929; Zimmerman, 1948).
Leucophaea maderae (Schletterer, 1889; Bordage, 1896; Kieffer, 1912): These records are probably erroneous inasmuch as this cockroach incubates its eggs internally (Roth and Willis, 1954). Later, after finding that L. maderae is ovoviviparous, Bordage (1913) admitted having misidentified a parasitized oötheca from some other species; he concluded that the developing eggs of this species are protected against egg parasites because they are carried within the female. Clausen (1940), in classifying the placement of parasitic wasp eggs in relation to the host, erected the category: Egg placed in the embryo while the latter is still within the parent. He stated that although this behavior was not definitely known to occur, it probably could occur. However, the records cited above do not indicate that the alleged parasitization followed this pattern.
Neostylopyga rhombifolia, Hawaii (Swezey, 1929).
Periplaneta americana, Europe (Schletterer, 1889; Bordage, 1896; Kieffer, 1912); Réunion Island (Bordage, 1913); Puerto Rico (Seín, 1923); Jamaica (Gowdey, 1925); Hawaii (Swezey, 1929); Palestine (Bodenheimer, 1930); U.S.A., Florida (Ashmead, 1900); Maryland (Piquett and Fales, 1952); Saudi Arabia, Jedda (Cameron, 1957); Canton Island and Samoa (Dumbleton, 1957).
Periplaneta americana or P. australasiae, Formosa (Sonan, 1924).
Periplaneta australasiae, U.S.A., Florida (Ashmead, 1900); Hawaii (Swezey, 1929; Zimmerman, 1948). [Girault (1914) erroneously attributed another record to Marlatt (1902); see footnote 6, above.]