l80 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I4I 



Macfie (p. 445) stated, "The cockroaches used in these experiments 

 had previously been carefully examined for amoebic infections a pre- 

 caution which was doubly necessary, because some of these insects at 

 Accra had been found naturally infected." 



Experimental vectors. — Periplaneta americana, Gold Coast Colony 

 (Macfie, 1922) : Entamoeba, resembling E. coli, from feces of the 

 monkey [Erythrocebus patas patas (Schreber)] were fed to cock- 

 roaches, and on the second to fourth days thereafter apparently 

 healthy cysts were recovered in the cockroach feces. 



Endolimax blattae Lucas 



Natural hosts. — Blatta orientalis, England (Lucas, 1927, 1927a) ; 

 U.S.S.R. (Zasukhin, 1930); Germany (Chen, 1933). 



Periplaneta americana, England (Lucas, 1927, 1927a) ; Indochina 

 (Weill, 1929) ; U.S.A. (Armer, 1944). 



Periplaneta australasiae, U.S.A. (Steinhaus, 1946). 



Organism is found in the hind gut of the cockroach. Zasukhin 

 (1930) found 3-percent infestation in over 3,000 B. orientalis ex- 

 amined. 



Endolimax nana (Wenyon and O'Connor) ? 



Synonymy. — Entamoeba nana. 



Natural host. — Blaberus atropos, Venezuela (Tejera, 1926) : A 

 small amoeba greatly resembling E. nana was found in the intestinal 

 contents of the cockroach. In inoculations this amoeba was not patho- 

 genic. 



Endolimax sp. 



Natural hosts. — Blatta orientalis, U.S.S.R. (Zasukhin, 1930) : This 

 organism was found in the hind gut of 0.3 percent of over 3,000 cock- 

 roaches examined. 



Blattella germanica and/or Periplaneta americana, Egypt (De- 

 Coursey and Otto, 1956, 1957) : Seventy-four out of 261 cockroaches 

 examined harbored this protozoan. 



lodamoeba sp. 



Natural vectors. — Blattella garmanica and/or Periplaneta ameri- 

 cana, Egypt (DeCoursey and Otto, 1956, 1957) : Fifty-nine of 261 

 cockroaches examined contained this protozoan. lodamoeba sp. was 

 common in human feces in villages in which the cockroaches were 

 collected. 



