84 JUSTIN M. ANDREWS. 



termitida). And finally, in T. trypanoides, there is a notable lack 

 of constancy in the number of anterior flagella, which vary from 

 one to four. 



Trichomonas termopsidis differs from Trichomitus termitidis 

 primarily by the possession of an axostyle. Trichomitus termitidis 

 is described from Termopsis angusticollis? (Kofoid and Swezy, 

 '19). In our material, we are positive of five colonies of the 

 sixteen studied as being Termopsis angusticollis, but it is very 

 probable that of the nine remaining unidentified colonies (two 

 were identified as Termopsis nevadensis] some are Termopsis 

 angusticollis, as the distribution and frequency of occurence of 

 these two species is the same in Oregon and California (Banks and 

 Snyder, '20). In mitosis, Trichomonas termopsidis is identical 

 with Trichomitus termitidis, which differs, as far as we are aware, 

 from every other form of trichomonad division described. Inas- 

 much as both forms are found in the same hosts, and as a size race 

 of Trichomonas termopsidis agrees in measurements with those 

 given for Trichomitus termitidis, and more particularly because 

 the same peculiar type of phenomenon takes place at mitosis in 

 both forms, which has not been described for any other forms, it 

 would appear that Trichomitus termitidis should be suitably con- 

 firmed before its validity is established. 



As Trichomitus termitidis differed from its type species, T. 

 parvus Swezy ('15) in having the type of division where the 

 centrosome is separated from the blepharoplast during the 

 process, whereas division in the type species was of the kind 

 described in Trichomonas and Eutrichomastix by Kofoid and 

 Swezy ('15), the species of Trichomitus found in the termite was 

 placed in a new subgenus, Trichomitopsis. Then, since Tri- 

 chomonas termopsidis differs from the other trichomonads previ- 

 ously described, in the same manner, it is proposed to assign this 

 flagellate to Trichomonopsis subgen. nov. 



Trichomonas with centrosome separated from blepharoplast at 

 mitosis. Type Species, Trichomonas termopsidis Cleveland, from 

 Termopsis nevadensis Hagen, and Termopsis augusticollis Hagen. 



BIBLIOGRAPHY. 

 Alexieff, A. 



'13 Systematisation de la mitose dite " primitive." Arch. f. Protist., 29, 344- 

 363. 



