398 



TR YPA NO SOMID^ 



Section I.: Trypanosomes of Hirudine,a. 



Trypanosoma inopinatum is believed to be a true parasite of the 

 leech Helobdella agira, though, according to some observers, it is the 

 same as the parasite of the frog. 



Section II.: Trypanosomes of Arachnida. 



T. christophersi Novy, 1907, found in Rhipicephalus sanguineus, 

 fed on dogs. 



Section III.: Trypanosomes of Hexapoda. 



Trypanosoma hoylei Lafont, 1902, has been found in Conorhinus 

 rubrofasciatus , an insect which attacks man in Mauritius and 

 Reunion. 



Trypanosoma tuUochi Minchin, 1907. — This parasite closely resembles C. 

 castellanii , from which it can be differentiated by the centr?! round nucleus 

 and the small centrosome. It is found in G. palpalis. 



T. culicis Novy, 1907, is found in various Culicinse. Novy strongly advocated 

 the view that the trypanosomes found in mosquitoes which Schaudinn had 

 fed on Athene noctuce infected with halteridium should be defined as T. noctucs 

 Schaudinn, 1904, a parasite of Culex pipiens, and the same for T. ziemanni 

 Schaudinn, 1904, also in Culex pipiens ; and, further, that the trypanosome 

 found by Durham in Stegomyia fasciata, which had been fed on bats, should 

 be looked upon as belonging to the mosquito. 



T. triatomce Kofoid and McCulloch, 1916, is a parasite of Triatoma 

 protracta, found in nests of the wood-rat Neotoma fuscipes. 



SERIES B: TRYPANOSOMES INFECTING COLD-BLOODED 

 VERTEBRATES. 



TRIBE 2: TRYPANOSOMEiE. 



At present this tribe contains one genus — viz., Trypanosoma 

 sensu stricto, as defined above, and with T. rotatorium Mayer, 1843, 

 as the type. 



It is probable that, as constituted, the genus still contains a 

 number of non-defined genera, but these require further investiga- 

 tion, and we therefore divide the species into: — 



Section I. : Trypanosomes of Fish. 

 Section II. : Trypanosomes of Amphibia. 

 Section III. : Trypanosomes of Reptilia. 



Section I. : Trypanosomes of P^ish. 



In 1 84 1 the first known trypanosome was found by Valentin in the blood of 

 Salmo fario, the brown trout. 



Since that time a considerable number have been found in fresh- and salt- 

 water fish all over the world. As examples may be mentioned T. remaki 

 Laveran and Mesnil, 1901, which exists in two varieties — parva and magna — 

 and is found in pike; T. my<2? Laveran and Mesnil, 1902, in Raja punctata, 



