C. Wellman and W. B. Wherry 
419 
seen. Leucocytozoa resembling those in squirrel 1 were found in smears 
from the lungs, spleen and liver. 
Remarks. As far as we know the recent work of Miller {Bull. 46, 
Hyg. Lab. U.S. Pub. Health and Mar. Hosp. Serv. 1908) on Hepatozoon 
perniciosum of the white rat has not yet been confirmed and as we cannot 
say whether or not schizogony takes place in the liver of the ground 
squirrel we have retained the term Leucocytozoon. (See also Patton, 
Parasitology, 1909, li. 144.) No evidence of schizogony was found in 
the liver smears and the only body resembling a vermicule was found in 
a spleen smear (Fig. 5). It might be mentioned, since there is a com¬ 
munication between rats and ground squirrels, that this Leucocytozoo7i 
is somewhat larger and differs in detail, e.g. nuclear structure, from a 
similar parasite which is commonly found in the Norway rat {31. norve- 
gicus) on the Pacific Coast. This parasite of the rat corresponds in size 
and nuclear structure with H. perniciosum Miller. 
Genus Ti'ypanozoori Liihe. 
T^^ypanosoma Auctt. 
Trypanozoon otospe^miophili sp. nov. 
These parasites in squirrel 2 were actively motile and superficially 
resembled T. lewisi. After methyl alcohol and Giemsa the total length 
was 29'5iJ,. From the pointed posterior end to the kinetonucleus 1'9 /a; 
kinetonucleus 0‘6 g ; from the kinetonucleus to the posterior end of the 
nucleus 9 g ; nucleus 1'8 g ; from the nucleus to the end of the flagellum 
16 g ; greatest breadth 1'5 g (Fig. 6). 
Fig. 6. 
Type in the collection of Wm. B. Wherry. 
Host. California ground squirrel (squirrel 2). 
Remarks. Two young white rats and a guinea-pig free from try¬ 
panosomiasis were injected intraperitoneally with a physiological salt 
solution emulsion of the lung of squirrel 2. Their blood was examined 
