172 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I4I 



♦Giardia sp. 

 Natural vectors. — Cockroaches, Venezuela (Tejera, 1926). 



Order HYPERMASTIGINA 



Family HOLOMASTIGOTIDAE 



Leptospironympha eupora Cleveland et al. 



Natural host. — Cryptocercus punctulatus, U.S.A., Appalachian area 

 (Cleveland et al., 1934). 



Leptospironympha rudis Qeveland et al. 



Natural host. — Cryptocercus punctulatus, U.S.A., Appalachian area 

 (Cleveland et al., 1934). 



Leptospironympha wachula Cleveland et al. 



Natural host. — Cryptocercus punctulatus, U.S.A., Appalachian area 

 (Cleveland et al., 1934). 



Macrospironympha xylopletha Cleveland et al. 



Natural host. — Cryptocercus punctulatus, U.S.A., northern Cali- 

 fornia (Cleveland et al., 1934). 



Family LOPHOMONADIDAE 

 Lophomonas blattarum Stein 



Natural hosts. — Blatta orientalis, Czechoslovakia (Stein, i860) ; 

 Germany (Biitschli, 1878; Schubotz, 1905; Chen, 1933); U.S.A. 

 (Leidy, 1879a; Kudo, 1922, 1925, 1926, 1926b; McAdow, 1931) ; 

 Europe (Janicki, 1908); U.S.S.R. (Yakimov and Miller, 1922; 

 Zasukhin, 1930) ; Poland (Lorenc, 1939). 



Blattella germanica, U.S.A., Ohio (McAdow, 1931). 



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

 Coursey and Otto, 1956, 1957). 



Periplaneta americana, England (Schuster, 1898) ; Europe (Ja- 

 nicki, 1910) ; U.S.A. (Kudo, 1926b; McAdow, 1931 ; Hatcher, 

 1939; Armer, 1944) ; Philippine Islands (Hegner and Chu, 1930). 



Periplaneta sp., Goa (Mello and Lima Ribeiro, 1924, 1925). 



"Kiichenschaben," Austria (Belar, 1916). 



The protozoan (fig. 2, E) is found in the host's colon, particularly 

 anterior portion; encysted stages of organism are found throughout 

 hind gut. Of 1,400 B. orientalis studied, 32 percent harbored this 

 organism (Kudo, 1925, 1926). Yakimov and Miller (1922) found 7 



