478 FAMILY: TEYPANOSOMIDiE 



but does not infect the rat. It is identical with T. criceti Liihe, 1906. 

 Noller (1912c) studied its development, and found it was morphologically 

 identical with T. lewisi, but not inoculable to rats, mice, or guinea-pigs. 

 Small trypanosomes, like the infective forms of T. lewisi, were found in 

 the rectum of fleas, Typhlopsylla assitnilis, Ceratophyllus fasciatus, and 

 Ctenocephalus canis, which presumably are able to transmit the infection. 



T. nabiasi Railliet, 1895. — This trypanosome, which Blanchard 

 (1904) referred to as Trypanosoma cuniculi, occurs in rabbits, Lepus domes- 

 ticus and L. cuniculus (Fig. 201, 7-8). It was first seen by Jolyet and 

 Nabias (1891), and has been found by numerous observers in various 

 parts of Europe. It is of the T. lewisi type and is not inoculable to rats 

 and mice, but can be maintained in rabbits. The multiplication phase 

 has not been properly studied. Brumpt (1913) proved its development 

 in and transmission by the rabbit flea, Spilopsyllus cuniculi. 



A trypanosome of the guinea-pig was described and figured by Kunstler 

 (1898). Judging from the figure, it would seem that the organism was not 

 a trypanosome at all. 



Cazalbou (1913) claimed that he had discovered a large trypanosome in 

 rabbits in France. It was 80 microns in length, the free flagellum being 

 10 to 12 microns long. There was a w^ell-developed membrane. Though 

 only one trypanosome was seen in one of a series of rabbits which died, 

 the trypanosome was assumed to have been the cause of death. Cazalbou 

 suggested the name T. gigas for this trypanosome. There seems to be 

 considerable doubt as to the accuracy of this observation. 



T. acouchii Brimont, 1909. — This is a trypanosome of the agouti 

 {Myoprocta acouchy) of French Guiana, and is of the T. lewisi type. Two 

 rats and two guinea-pigs were inoculated, with negative results. Multipli- 

 cation forms are not known. 



T. indicum Liihe, 1906. — This form occurs in the Indian palm squirrel 

 (Sciurus pahnarum). It resembles T. lewisi, but is distinctly smaller. 

 Multiplication forms have not been seen. 



T. spermophili Laveran, 1911. — This is a small trypanosome of the 

 T. lewisi type, and is found in Spermophilus musicus, S. guttatus, and 

 S. everstnanni of Russia and Siberia. The Canadian trypanosome 

 T. citelli Watson, 1912, occurring in the squirrel, Citellus richardsoni, is 

 possibly the same species. 



T. otospermophili Wellman and Wherry, 1910. — This trypanosome 

 is very similar to T. spermophili^ and occurs in the Californian ground 

 squirrel, Otospermophilus beecheyi. Neither this nor the last-named species 

 has been fully studied. 



T. bandicotti Lingard, 1904. — This trypanosome was discovered by 

 Lingard in 1893 and named by him (1904). It occurs in the bandicoot 



