_Natural hosts._--_Blattella germanica_, Brazil, Distrito Federal (Gomes, 1941): In the English summary of his paper, Gomes states that _C. merceti_ var. _falsicornis_ was reared from _B. germanica_. However, in the body of the paper, he states that the _supposed_ origin of the parasite was the oötheca of _B. germanica_. Burks (personal communication, 1956) does not believe that this wasp parasitizes the eggs of _B. germanica_. We (unpublished data, 1957) exposed six oöthecae of _B. germanica_ to _C. merceti_. In order to retard water loss the oöthecae were removed from the females by cutting the insects in two so that each oötheca remained attached to the posterior part of the abdomen. No wasps developed in these oöthecae. _Supella supellectilium_, U.S.A., Kansas (Lawson, 1954a); Hawaii (Zimmerman, 1944; Compere, 1946; Keck, 1951). _Adult behavior._--Males and nonovipositing females showed a flea-like jumping tendency. Adults were attracted to light and were found near windows. Both sexes pursued an erratic course in walking and continually touched the surface with their antennae. (Lawson, 1954a.) _Oviposition._--The wasp (pl. 34, B) selected a site on an oötheca with the sheath of her ovipositor; it was uncertain whether there was a definite preference for oviposition sites. Wasp tended to choose a nearly horizontal position for oviposition. She preferred to oviposit into eggs about 2 weeks old, although she would place eggs in oöthecae less than a week old and in embryos in the green band stage. There were 1-50 oviposition punctures per oötheca. (Lawson, 1954a.) _Development._--If enough wasp larvae were present, they ate all eggs in an oötheca. Occasionally wasps developed in one end of an oötheca while cockroaches developed in the other; when this occurred, the cockroach nymphs always emerged last. The developmental period was 30-41 days at room temperature. There were 5-25 parasites per oötheca. The single exit hole in the oötheca varied from 0.6 to 0.9 mm. in diameter. (Lawson, 1954a.) _Distribution._--U.S.A.: New Jersey south to Florida, west to Illinois, Kansas, and Arizona. West Indies; Central and South America; Hawaii. (Burks, personal communication, 1956.) =Dicarnosis alfierii= Mercet _Natural hosts._--"_Phyllodromia_" sp., Egypt (Mercet, 1930): According to Mercet, Dr. Alfieri claimed that this wasp parasitized one of the species of "_Phyllodromia_" found in Egypt, namely, _Phyllodromia_ [= _Blattella_] _germanica_, _Phyllodromia_ [= _Supella_] _supellectilium_ and/or _Phyllodromia treitliana_. We do not know to which modern genus the host of this wasp belonged. Cockroach, Egypt? (Mercet in Compere, 1938.) =Eutrichosomella blattophaga= Girault _Natural host._--Cockroach, Australia, Queensland (Girault, 1915). Family EUPELMIDAE[7] =Anastatus blattidifurax= Girault _Natural host._--Cockroach, Australia, Queensland (Girault, 1915). =Anastatus floridanus= Roth and Willis