422 J. B. CLELAND AND T. H. JOHNSTON. 



that we have found free trypanosomes in five species of 

 birds. In only one of these species have we failed so far 

 to find intracorpuscular bodies. In addition, in four other 

 species we have found the latter bodies without trypano- 

 somes. Trypanosomes, when present, have always been 

 few and more easily overlooked, whilst intracorpuscular 

 bodies have usually been found with ease. 



Trypanosomes — Free and Intracorpuscular. 



Free Trypanosomes of Micrceca fascinans (M. 483). In 

 one of these birds, obtained in May at Eidsvold, Q., free 

 trypanosomes as well as halteridia were found. The para- 

 sites were very broad and similar to those described later 

 under Pardalotus melanocephalus. The posterior end was 

 broad and irregular, the latter perhaps the effect of distor- 

 tion ; the body then narrowed rapidly to end in a short beak 

 at the anterior end. The body was a deep blue, in some 

 cases having an alveolar arrangement, in others showing 

 streaky lines of fine bluish granules. There was a central 

 macronucleus : the micronucleus appeared near the pos- 

 terior end as a very conspicuous large deep purple dot or 

 rod. A narrow undulating membrane was visible, but the 

 flagellum was not definitely recognisable. No intracor- 

 puscular phases were seen. Other specimens, four in 

 number, obtained in April and May showed halteridia in 

 three cases, but no trypanosomes. 



Free and Intracorpuscular Trypanosomes of Pardalotus 

 melanocephalus (M. 729). In a bird obtained at Eidsvold, 

 Q., in March, a few fine specimens of trypanosomes were 

 found. The parasites were large and conspicuous, with a 

 broad blunt posterior end from which the body narrowed 

 uniformly to end in an elongated anterior end. The body 

 was a deep blue with an alveolar appearance: a large 

 macronucleus occupied the centre: a deep purple spot close 

 to the posterior end indicated the micronucleus, from which 



