257 
a small amount of nuclear matter. They measure 
55 by io n about. The male stains much less deeply 
and has more abundant nuclear matter. Quite young 
Fig. j6a. Upper figure : shewing the three kinds of ookinet and the three 
trypanosomes developed from them in the mosquito’s stomach. Lower 
figure: shewing the development of the indifferent trypanosomes into 
H. noctuae in the blood (after Schaudinn) 
forms consisting of a nuclear dot surrounded by a 
little protoplasm also occur, and also a variety of stages 
between these and full-grown adults. 
s 
