312 L. R. CLEYKI.ANU. 



to 70-80 per cent.; with still more study after fixation and 

 staining the percentage of individuals in which axostyles may be 

 seen increases to 85-90 per cent., though never reaching 100 

 100 per cent. In other words, the number of individuals which 

 at first glance would be diagnosed as Trichomitus, diminishes 

 concomitantly with scrutiny of observation. Professor Kofoid 

 when notified recently by letter of this finding and of the possi- 

 bility that the species of Termopsis in California (although the 

 protozoa in those colonies I examined were the same as in the 

 Oregon Termopsis} might harbor Trichomitus while in Oregon 

 they harbor only Trichomonas, wrote: "We find both Tricho- 

 monas and Trichomitus in the same hosts in California. We have 

 regarded this Trichomonas as possibly the one described by 

 Dogiel although we have not attempted to work it up." Pro- 

 fessor Kofoid also kindly sent me slides which show an abundance 

 of Trichomonas. However, in the papers of Kofoid and Swezy 

 ('19), as noted by the quotations already given, no mention of the 

 presence of Trichomonas appeared. This organism in Termopsis 

 does not seem to me to be the same one which Dogiel l described 

 as Tetratrichomonas macrostoma from Rhinotermes sp. of Uganda. 

 The two hosts are widely separated and belong to two families; 

 Rhinotermes Hagen belongs to the Rhinotermitidae, and Termopsis 

 Heer to the Kalotermitidse. The species of Trichomonas in 

 Termopsis has four anterior flagella (elsewhere the statement 

 was made by the WTiter ('240) that it had three anterior flagella, 

 but more careful examination shows clearly that some individuals 

 have four anterior flagella, which is perhaps the normal number), 

 axostyle and undulating membrane, which place it definitely in 

 the genus Trichomonas. I, therefore, describe it (Figs. 5, 6) as 

 Trichomonas termopsidis sp. nov., found certainly in Termopsis 

 nevadensis Hagen and probably in T. angnsticollis Hagen. 



This is not the time nor the place for a discussion of the 

 genera Trichomitus and Trichomonas. If Trichomitus is present 

 though I am inclined somewhat to doubt it it has behaved 

 the same way as Trichomonas in the starvation and oxygenation 

 experiments. But, since it is not certain that Trichomitus is 

 present or even exists, no mention of this genus will be made in 

 these experiments. 



1 Dogiel. V.; Jour, ruse de Zoo/. (Petrograd). I. 



