Natural host.—Ellipsidion australe, Australia, Queensland (Dodd, 1917).
Syntomosphyrum blattae Burks
Natural hosts.—Parcoblatta sp., U.S.A., Ohio (Burks, 1952; Edmunds, 1952a, 1953a): Ten oöthecae yielded an average of 92 wasps (Edmunds, 1952a). Five oöthecae, collected a year later, yielded an average of 74 wasps; adults sometimes made two to three exit holes in the oötheca (Edmunds, 1953a).
Cockroach, U.S.A., West Virginia (Burks, 1952).
Syntomosphyrum ischnopterae (Girault)
Synonymy.—Epomphaloides ischnopterae Girault [Peck, 1951].
Parker and Thompson (1928) called their hyperparasite Tetrastichus sp. However, Dr. B. D. Burks (personal communication, 1955) has examined the teneral specimens which Parker and Thompson deposited in the U.S. National Museum; he stated that the species is apparently Syntomosphyrum ischnopterae. In view of the experimental work by Parker and Thompson (see below), this wasp may prove to be a hyperparasite on evaniids in cockroach oöthecae rather than a primary parasite on cockroach eggs. (See Zeuxevania splendidula, p. [243].)
Natural hosts.—Ischnoptera sp. [probably Parcoblatta sp. (Rehn, personal communication, 1958)]. U.S.A., Maryland (Girault, 1917).
Zeuxevania splendidula Costa (an evaniid in the oöthecae of Loboptera decipiens), France (Parker, 1924; Parker and Thompson, 1928).