BIOTIC ASSOCIATIONS OF COCKROACHES — ROTH & WILLIS 169 



Order POLYMASTIGINA 



Family CHILOMASTIGIDAE 



Chilomastix mesnili (Wenyon) 



Experimental vectors. — Blatta orientalis and Periplaneta ameri- 

 cana. South Africa (Porter, 1918) : The cockroaches were fed 

 human excrement that contained cysts of C. mesnili. The cysts 

 passed unharmed through the insects' digestive tract. Rats became in- 

 fected with this protozoan on eating food that had been contaminated 

 with feces from these cockroaches. 



Family POLYMASTIGIDAE 



Eutrichomastix sp. 



Synonymy. — Trichomastix [Kudo, 1954]. 



Natural host. — Blattella germanica and/or Periplaneta americana, 

 South Africa (Porter, 1930). 



Monocercomonoides globus Cleveland et al. 



Natural host. — Cryptocercus pimctulatus, U.S.A., Appalachian and 

 Pacific coast areas (Cleveland et al., 1934) : Organism occurs in 

 practically all hosts, 



Monocercomonoides melolonthae (Grassi) 

 (Fig. 2, A) 



Natural host. — Platysosteria novae seelandiae, New Zealand 

 (Laird, 1956) : Found in the intestinal tracts of the adult cock- 

 roaches, and of other species of insects. 



Monocercomonoides orthopterorum (Parisi) 



Synonymy. — Trichomonas {Trichomastix) orthopterorum Parisi; 

 Monocercomonas orthopterorum [Belar, 1916] ; Trichomastic or- 

 thopterum? [Zasukhin, 1930] ; Monocercomonoides orthopterorum 

 [Travis, 1932 ; Cleveland et al., 1934] ; Retortamonas orthopterorum 

 [Semans, 1943]. 



Natural hosts. — Blatta orientalis, Italy (Parisi, 1910) ; U.S.S.R. 

 (Zasukhin, 1930). 



Ectohius lapponicus, Italy (Parisi, 1910). 



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



"Kiichenschaben," Austria (Belar, 191 6). 



The protozoan is found in the hind gut. Zasukhin (1930) found 



