POLYMASTIGINA 



391 



angusticollis, Z. nevadensis and Z. laticeps; California and Arizona. 

 Culture and encystment (Trager, 1934). 



Genus Pentatrichomonas Mesnil. Similar to Trichomonas, but 

 with 5 free anterior flagella. 



P. bengalensis Chatterjee. 9-20ju by 7-14/*; in human intestine. 

 Kirby (1943, 1945a) observed that of the five flagella, four arise from 



Fig. 167. a, Trimastix convexa, X1310 (Hollande); b, Tricercomitus 

 termopsidis, X665 (Kirby) ; c, Pentatrichomonoides scroa, X1500 (Kirby); 

 d, Pseudotrypanosoma giganteum, X435 (Kirby). 



the end of a columnar (1-2ju long) extension, while the fifth flagellum 

 is a little shorter and takes its origin about 1m behind the extension. 



Genus Pentatrichomonoides Kirby. Five anterior flagella and the 

 undulating membrane; axostyle very slightly developed; fusiform 

 parabasal body; nucleus separated from the anterior blepharoplast; 

 in termite gut. 



P. scroa K. (Fig. 167, c). 14-45/u by 6-15/z; in Cryptotermes dudleyi 

 and Lobitemies longicollis. 



Genus Pseudotrypanosoma Grassi. Large, elongate; 3 anterior 

 flagella; undulating membrane; slender axostyle; band-like structure 

 between nucleus and blepharoplast; parabasal body long, narrow; 

 in termite gut. 



P. giganteum G. (Fig. 167, d). 55-lU/u long (Grassi); 145-205/* by 



