2 5 8 



Schaudinn has described the development of these 

 parasites in the stomach of Gulex pipiens, where they 

 eventually become trypanosomes and finally minute 

 spirochaetes. Infection then takes place during biting 



Fig. 766. Shewing development of the ookinet of H. ziemanni mi<> 

 trypanosom.es and then spirochaetes, in the mosquito (after Schaudinn) 



and after again passing through a trypanosome stage 

 they infect the blood cells again. This has not been 

 confirmed, and it must be borne in mind that owls are 



