BIOTIC ASSOCIATIONS OF COCKROACHES — ROTH & WILLIS 75 



be incipient pests; these latter species may attain future economic 

 importance if they establish breeding colonies within a structure. A 

 few species have undoubtedly wandered indoors by accident. It is 

 difficult to decide whether a particular species was an accidental in- 

 vader or whether it was attracted indoors in response to some stimulus. 

 Only additional information will provide the desired answers. 



Aglaopteryx ypsilon 

 Trinidad. — Male found indoors (Princis and Kevan, 1955). 



AUacta similis 



Hawaii. — Found only indoors at Nauhi. Otherwise this is ap- 

 parently an outdoor species (Swezey and Williams, 1932). 



Blaberus craniifer 



Cuba. — Household pest (Deschapelles, 1939). Particularly abun- 

 dant in houses in Santiago and Havana (Rehn and Hebard, 1927). 



Florida. — Under boards in woodshed (Rehn and Hebard, 191 2, 

 1914). 



Blaberus discoidalis 



Ecuador. — In eating places (Campos R., 1926). 

 Hispaniola. — In houses (Rehn and Hebard, 1927). 

 New Jersey. — In greenhouse (Weiss, 1917). 

 Puerto Rico. — In homes (Sein, 1923). In fruit stores (Wolcott, 

 1950). 



Blatta lateralis 



Central Asia. — Household pest, often found in homes with clay 

 floors (Bei-Bienko, 1950). 



Turkmen S.S.R. — Males and females occurred in dwellings 

 (Vlasov, 1929). 



Blatta orientalis 



This species is a cosmopolitan domiciliary pest (Hebard, 1917; 

 Rehn, 1945). It is reported to occur particularly in basements and 

 crawl spaces under basementless houses (Mallis, 1954). In damp 

 basements where food is available large colonies are not unusual, but 

 it also may infest offices and apartments several floors off the ground 

 (Gould and Deay, 1940). The number encountered on upper floors 

 is seldom large, but the frequency of occurrence may reach 30 percent 

 of the observations (Spear et al., in Shuyler, 1956). In supermarkets 

 this species hides during the day inside concrete blocks or cracks in 



