_Natural prey._--_Periplaneta americana_, Brazil, Matto Grosso (Pinto, 1927, 1927a): This bug preys principally on cockroaches and was observed infesting the walls of dwellings where it preyed on _P. americana_.
_Natural prey._--_Monastria_ sp., Brazil, Minas Gerais (Martins, 1941): This bug probably feeds on cockroaches of this genus, as well as on rodents.
_Natural prey._--_Arenivaga roseni_ and _Polyphaga saussurei_, Turkmen S.S.R. (Vlasov and Miram, 1937): These desert cockroaches are found in burrows of rodents and desert turtles around Ashkhabad. Reduviids are their main enemies. Vlasov (1933) found nymphs of _Reduvius christophi_ Jak. and _R. fedtschenkianus_ Osch. in similar burrows in this same area, although he did not specifically cite them as enemies of the desert cockroaches.
_Experimental prey._--Cockroaches, U.S.A. (Hoffman, 1924).
_Experimental prey._--_Blattella germanica_, Kenya Colony (Someren, 1924).
From the few observations that have come to our attention, it seems that flies are comparatively rare parasites in cockroaches.
_Host._--Eggs of _Parcoblatta_ sp., Ohio (Edmunds, 1952a).
_Hosts._--Cockroaches, Brazil (Souza Lopes, 1937): L. Travassos was quoted as having observed this species pursue cockroaches that were escaping columns of the army ant _Eciton_ sp. Souza Lopes (1937) stated that the female deposits eggs on the cuticle of the host near the end of the body; the egg is barely inserted and two recurrent hooks prevent it from falling off. Souza Lopes (1937) also observed other species of _Stylogaster_ pursue Orthoptera, but he was unable to devote proper attention to the behavior of the flies.
_Hosts._--_Chorisoneura_ sp., Brazil (Souza Lopes, 1937): An adult specimen was found in a museum collection with an egg of _Stylogaster_ attached to the posterior end of its abdomen.
Cockroaches, Panama (C.W. Rettenmeyer, personal communication, 1959): "Seven species were collected hovering over army ant swarms and a few flies were seen apparently attacking cockroaches that had been flushed by the ants."
_Hosts._--_Periplaneta americana_, Brazil (Souza Lopes, 1937): Obtained complete evolution of the parasite in this host. This may have been an experimental host.