_Hosts._--Cockroaches, Panama (Rettenmeyer, personal communication, 1959): Swarms of army ants are accompanied by about 20 species of _Calodexia_. These flies larviposit on the cockroaches, crickets, and possibly other arthropods that are flushed from cover by the ants. Larvae were found in one(?) cockroach. Larvae from an adult of _Calodexia_ were introduced experimentally into a cockroach and successfully reared.
_Hosts._--_Eurycotis floridana_, from Florida (Roth, unpublished data, 1953): Three larvae (det. by W.W. Wirth) were found in a living adult male.
_Panesthia australis_, from Australia (Roth, unpublished data, 1957): Reared from a wild-caught cockroach that was maintained in a laboratory colony.
Cockroaches, Australia (E. F. Riek, personal communication, 1955): Reared from some of the larger species.
_Host._--Eggs of _Parcoblatta_ sp., Ohio (Edmunds, 1952a).
_Host._--_Arenivaga bolliana_, Texas (Wirth, personal communication, 1953): Specimens in U.S. National Museum.
_Synonymy._--_Sarcophaga sternodontis_ (Towns.).
Hoffman (1927) claimed that approximately 40 percent of some specimens of _Pycnoscelus surinamensis_ collected in southern Haiti were parasitized by _S. lambens_. However, according to entomologists at the University of Puerto Rico Agricultural Experiment Station, Hoffman was incorrect in his observations: _S. lambens_ was never reared from a living insect and had been recovered only from dead cockroaches and other dead insects and was considered saprophytic rather than parasitic (Schwabe, 1950b).
Sanjean (1957) reared various species of sarcophagid larvae on _Periplaneta americana_ which were freshly killed or chopped up; first instar larvae were also introduced into the body cavity of cockroaches which had their heads and legs removed. Adult sarcophagids were collected and freshly killed American cockroaches used as bait.
_Experimental prey._--_Cryptocercus punctulatus_, U.S.A. (Cleveland et al., 1934): This beetle is often found in the galleries of _C. punctulatus_ in nature. In the laboratory it killed and devoured cockroaches as large as itself.
_Experimental prey._--Cockroaches, disabled, Hawaii (Williams, 1936): This beetle, which is common in mountain streams, located wounded cockroaches in an aquarium by sense of smell or taste rather than sight.