BIOTIC ASSOCIATIONS OF COCKROACHES — ROTH & WILLIS I7I 



Family TRICHOMONADIDAE 

 * Trichomonas hominis (Davaine) 



Experimental vectors. — Blatta orientalis, South Africa (Porter, 

 1918) ; Italy (Mariani and Besta, 1936). 



Periplaneta americana, South Africa (Porter, 1918) ; U.S.A. 

 (Hegner, 1928). 



Trichomonas sp. 



Natural vector. — Cockroach, Venezuela (Tejera, 1926) : Organism 

 found in digestive tract of the cockroach. 



Family HEXAMITIDAE 



Hexamita cryptocerci Cleveland et al. 



Natural hosts. — Cryptocercus punctulatus, U.S.A. (Cleveland et 

 al., 1934). 



Panesthia angustipennis, Philippine Islands (Kidder, 1937). 



Hexamita periplanetae (Belar) 



Synonymy. — Octomitus periplanetae Belar [Kudo, 1954]. 



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

 ganism is found in the hind gut. Eighty-five percent of over 3,000 B. 

 orientalis contained this organism. 



Periplaneta americana, Philippine Islands (Hegner and Chu, 1930). 



"Kiichenschaben," Austria (Belar, 1916). 



Hexamita sp.? 



Natural host. — Leucophaea maderae, Philippine Islands (Hegner 

 and Chu, 1930) : The flagellates were present in large numbers. 



* Giardia intestinalis (Lamb!) 



Experimental vectors. — Blatta orientalis, South Africa (Porter, 



1918)- 

 Blattella gcrnianica, Brazil (Pessoa and Corrca, 1927). 



Eurycotis floridana, U.S.A. (Young, 1937). 



Leucophaea maderae, Brazil (Pessoa and Correa, 1927). 



Periplaneta americana, South Africa (Porter, 1918) ; Gold Coast 

 Colony (Macfie, 1922) ; Brazil (Pessoa and Correa, 1927) ; U.S.A. 

 (Young, 1937). 



Periplaneta brunnea, U.S.A. (Young, 1937). 



Cockroaches, Venezuela (Tejera, 1926) ; Argentina (Bacigalupo, 

 in Tejera, 1926). 



