482 FAMILY: TRYPANOSOMIDtE 



leptomonas and leishmania types in this bug, and raise the question of 

 their being developmental forms of the bat trypanosome. What are 

 probably developmental stages of the trypanosome were seen by Franchini 

 (1921) in the mite, Leiognathus laverani. Rodhain (1923) found that mites 

 (Leiognathus) taken from infected bats harboured crithidia and trypano- 

 somes, so that it seems probable that this mite is the vector of the try- 

 panosome named T. heybergi by Rodhain. 



Battaglia (1914) has claimed that T. vespertilionis is pathogenic to 

 rabbits. He makes a similar claim for T. lewisi. No other observer has 

 succeeded in confirming these statements, attempts at infecting laboratory 

 animals with the trypanosomes of bats having invariably failed. 



(c) Trypanosomes of Insectivora. 



Trypanosoma talpae Nabarro, 1907. — Petrie (1905) discovered a 

 trypanosome in the English mole, Talpa europcBci. The trypanosome 

 was again seen by Thomson, J. D. (1906), and by Franga (1911a) in 

 Portugal in T. europcea and T. cceca. Though resembling Try]m7iosoma 

 lewisi in some respects, it is not inoculable to rats (Fig. 201, 5-6). Nabarro 

 (1907) gave it the name T. talpce. Laveran and Franchini (19136) found 

 developmental forms of the trypanosome in the mole flea {Paloeopsylla 

 gracilis). 



T. soricis Hadwen, 1912. — This is a trypanosome of the wandering 

 shrew {Sorex vagrans) in Canada. It is of the T. lewisi type, but reaches 

 a total length of only 17*5 microns. 



T. brcdeni Rodhain, Pons, Vandenbranden and Bequa^rt, 1913. — 

 This form, again, is of the T. lewisi type, and occurs in Petrodromiis tetra- 

 dactylus of the Belgian Congo. 



T. denysi Rodhain, Pons, Vandenbranden and Bequsert, 1913. — 

 This trypanosome, which is larger than the preceding one, was discovered 

 in Pteromys volans. It had a total length of 37 to 48 microns, of which 

 8 to 10 microns represented the flagellum. 



T. xeri Leger and Baury, 1922. — This form occurs in the fossorial 

 squirrel {Xerus erythropus) of Senegal, and is very similar to T. denysi. 



(d) Trypanosomes of Edentata. 



A trypanosome, named T. legeri by Mesnil and Brimont (1910), was 

 discovered by Brimont in an ant-eater, Tamandua tridactyla, in French 

 Guiana (Fig. 201, 14-15). The body of the trypanosome is 30 to 35 microns 

 in length, and the flagellum 10 to 13 microns. In breadth it varies on 

 either side of 5 microns. The posterior extremity extends for about 

 14 to 16 microns beyond the kinetoplast. Besides these large forms 

 there occurred others which were smaller, and resembled Trypanosoma 



