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). The following information is from Parker and Thompson (1928): _Adult behavior._--Courtship and mating were accomplished as soon as adults emerged, and in a manner similar to that in other chalcids. The females oviposited only into oöthecae that were parasitized by _Zeuxevania_, never into normal, nonparasitized oöthecae. _Oviposition._--Oviposition occurred two days after mating. The female wasp stroked the oötheca with her antennae, selected a site, and bored into the oötheca with her ovipositor. She inserted the ovipositor deeply and oviposited for 10-30 minutes. The eggs were deposited randomly on the evaniid larva, some upright and others lying down. _Development._--Eggs of the hyperparasite hatched within 3 days and the larvae commenced feeding on the host larva. There were 30 and 50 hyper-parasites in two oöthecae. _Sex ratio._--5 [F][F]:1 [M] (from 3 oöthecae). _Distribution._--U.S.A., District of Columbia, Maryland (Burks, 1952). =Tetrastichus australasiae= Gahan _Natural host._--_Periplaneta australasiae_, Sumatra (Gahan, 1923). =Tetrastichus hagenowii= (Ratzeburg) _Synonymy._--_Entedon hagenowii_ Ratzeburg, _Blattotetrastichus hagenowii_ (Ratzeburg) [Burks, 1943]. _Tetrastichodes asthenogmus_ Waterston. G. J. Kerrich (personal communication, 1957) compared the type of _Tetrastichodes asthenogmus_ Waterston with authentically determined material of _Tetrastichus hagenowii_ and concluded that _T. asthenogmus_ is only a weakly developed specimen of _T. hagenowii_. He stated, "The longitudinal dorsal grooves of the scutellum, which are strongly developed in normal _hagenowii_, are only rather faintly developed in Waterston's type and also the second specimen, which was dissected and mounted on a series of ten microscope slides. No doubt it was this faint development that caused Waterston to describe the species in _Tetrastichodes_, a segregate that has since been recognized by Dr. Burks (Proc. U. S. Nat. Mus., 1943) as being not truly generically distinct from _Tetrastichus_." _Natural hosts._--_Blatta orientalis_, Seychelles (Ratzeburg, 1852); India (Usman, 1949). _Blatta_ sp., U.S.A., Louisiana (Gahan, 1914).