This is a cosmopolitan domiciliary pest (Hebard, 1917; Rehn, 1945). It is common in restaurants, grocery stores, bakeries, and where food is prepared or stored; it was trapped regularly in the basement and upper floors of store buildings, and it was also found in all heated parts of an old meat-packing plant (Gould and Deay, 1938). _P. americana_ was numerous in latrines in Iran (Bei-Bienko, 1950) and in privies in Texas (Dow, 1955) and Georgia (Haines and Palmer, 1955). Large numbers of this species also occur in sewers adjacent to human habitations (Roth and Willis, 1957a). =Periplaneta australasiae= Generally domiciliary, but also occurs outdoors in the West Indies (Rehn and Hebard, 1927). It is a very abundant domiciliary pest in tropical Africa and tropical America (Rehn, 1945); Ecuador (Campos R., 1926); Puerto Rico (Sein, 1923); Philippine Islands (Uichanco, 1953); Australia (Pope, 1953). Also occurs as a pest in greenhouses in Pennsylvania (Thilow and Riley, 1891); France (Giard, 1900); Italy (Boettger, 1930); Great Britain (Laing, 1946; British Museum [Nat. Hist.], 1951). =Periplaneta brunnea= Circumtropical domiciliary pest which is apparently more nearly peculiar to the Tropics and adjacent regions than _P. americana_ (Hebard, 1917). This species has been trapped in significant numbers in privies and dwellings in Georgia (Haines and Palmer, 1955). It is the species of _Periplaneta_ present in homes in San Antonio, Texas (Mallis, 1954). =Periplaneta fuliginosa= _U.S.A._--Frequently encountered out of doors, but has been reported common after dark about a hotel in Alabama and was captured in a house in Louisiana; it was also extremely abundant on the wharves at night in Jacksonville, Florida (Hebard, 1917). As a domiciliary pest it was, next to _Blattella germanica_, the most common cockroach inside homes in southwest Georgia, where it was also the most common cockroach in privies (Haines and Palmer, 1955). This species has become a very common domiciliary pest in Texas (Eads, personal communication, 1955). It infested a greenhouse for five years in Indiana (Gould and Deay, 1940). =Periplaneta ignota= _Australia._--It occurs in dwellings occasionally (Pope, 1953). =Phaetalia pallida= _Colombia._--Three specimens from three dwellings (Princis, 1946). _Trinidad._--Male indoors; male and female at light (Princis and Kevan, 1955). =Plectoptera dorsalis= _Puerto Rico._--According to Gundlach (1887) it enters houses at night attracted by light (Rehn and Hebard, 1927). =Polyphaga aegyptiaca= _Iraq._--Common in houses (Weber, 1954). _Caucasus._--Winged male in kitchen (Burr, 1913). _U.S.S.R._--Listed as a sinanthrope (Bei-Bienko, 1950). =Polyphaga saussurei= _South-central Asia._--One of the commonest domiciliary species (Bei-Bienko, 1950). =Pseudophoraspis nebulosa= _East Indies._--This species is sometimes difficult indoors (Karny, 1925). =Pycnoscelus surinamensis=