178 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I4I 



Periplaneta australasiae, U.S.A. (Morris, 1936). 



Cockroaches, Paraguay ? (Elmassian, 1909) ; Austria (Belar, 

 1916) ; U.S.A. (Morris, 1935, 1936; Balch, 1932); Venezuela 

 (Tejera, 1926). 



The habitat of E. hlattae (fig. 2, C) is the hind intestine and rectum 

 of the cockroach. The incidence of infection varies: Kudo (1925a) 

 found in 1,255 oriental cockroaches infections in 5 percent in March 

 and 50 percent in the summer; Schubotz (1905) found 5 to 20 per- 

 cent of the examined cockroaches to be infested ; Yakimov and Miller 

 (1922) found 4 percent of 124 oriental cockroaches infested; Za- 

 sukhin (1930) found up to 50 percent of over 3,000 B. orientalis in- 

 fested; Meglitsch (1938, 1940) found almost 100 percent infection in 

 B. orientalis kept in a crowded culture for several weeks. Chen ( 1933) 

 developed two synthetic media in which E. blattae could be grown for 

 45 to 50 days. 



Mercier (1907a) observed a fungus, Nucleophaga sp., hyper- 

 parasitic in the nucleus of Endamoeba blattae. 



Endamoeba javanica Kidder 



Natural hosts. — Panesthia angustipennis, Philippine Islands, and 

 Panesthia spadica, Japan (Kidder, 1937) : Occurred in 50 percent of 

 P. angustipennis examined and in one of four P. spadica. The en- 

 doplasm of this amoeba contains large amounts of wood and cellulose 

 fibers. 



Endamoeba philippinensis Kidder 



Natural host. — Panesthia angustipennis, Philippine Islands (Kid- 

 der, 1937) : Occurred in about 10 percent of the Panesthia examined. 

 The food vacuoles contained bacteria, no wood. 



Entamoeba coli (Grassi) 



Synonymy. — Endamoeba coli, Amoeba coli [Kirby, 1945]. 



Natural vectors. — Blaberns atropos, Venezuela (Tejera, 1926) : In 

 a lot of 60 cockroaches captured in latrines, two were found that 

 carried apparently live cysts similar to cysts of E. coli. 



Blattella germanica or Periplaneta americana, Egypt (DeCoursey 

 and Otto, 1956, 1957) : One out of 44 cockroaches collected in a 

 village harbored E. coli. 



Experimental vector. — Periplaneta americana, Gold Coast Colony 

 (Macfie, 1922) : In nine experiments cysts oi E. coli were fed to the 



