24 
Trypanosomes 
Trypanosoma citelli n. sp. Watson. 
(PI. I. figs. 5, 6.) 
Found in the ground-squirrel or prairie-gopher, Gitellus richardsoni 
(Sabine), at Lethbridge, Alberta, on April b, 1908. (Watson.) 
The blood of three ground-squirrels out of 12 examined (March—July, 
1908) showed trypanosomes. Unlike the rabbit and mouse infections, 
in which the parasites are often plentiful, only one or two parasites 
could be found in each slide preparation of blood of infected animals. 
This trypanosome is 35 /a in length and has morphological characters 
that differentiate it from any other species recorded in this paper. 
Excepting the giant trypanosome of the cow, it is considerably longer 
and the body of the parasite terminates anteriorly more abruptl}^ 
leaving a long free flagellum. The posterior extremity is very slender 
and finely pointed, the trophonucleus is elongated and well forward, 
and the kinetonucleus always appears round, never elliptical or rod¬ 
shaped. 
Non-pathogenic for gophers, mice and rabbits. 
Trypanosoma lewisi (Kent), 1882. 
Found in six rats out of 16 examined at Ottawa, Ontario, on 24.1.07. 
(Hadwen.) 
Trypanosoma sp. Bowhill, 1909. 
From squirrel’s blood. Mount Lehman, B. C., Fig. 31, in Health of 
Animals Report, 1909. (Bowhill.) 
Trypanoplasma sp. Bowhill, 1909. 
In blood of cow. Mount Lehman, B. C., Fig. 29. “ Red water- 
investigations in British Columbia” in Health of Animals Report, 1.909. 
(Bowhill.) 
No description is given of this parasite; it is probably a large try¬ 
panosome instead of a trypanoplasm and may be identical with 
T. rutherfordi, described below. 
Trypanosoma rutlmfordi n. sp. Hadwen. 
(PI. II. fig. 10.) 
A single parasite was found in the blood of a cow at Mount Lehman, 
B. C., on 18.4.10. (Hadwen.) 
The parasite appears to be non-pathogenic as the cow was fattened 
later and killed for beef. A rabbit was inoculated with blood but 
