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



as the intracorpuscular bodies which were also present. 

 The micronucleus was prominent near the posterior end : 

 the undulating membrane was just recognisable with a 

 short flagellum anteriorly. Another trypanosome was 

 paler and less broad. One of the intracorpuscular forms 

 had a definite deeply-stained micronucleus. 



Short filarise were present in one of these birds, but 

 halteridia were not detected, though found in another 

 specimen. 



In another bird, obtained in March at Eidsvold, a few 

 free trypanosomes and intracorpuscular bodies were found. 

 The trypanosomes were of the half-broad and narrow 

 types with well-marked undulating membranes and moder- 

 ately short flagella. The posterior end in one was shortly 

 beaked. A few deep blue granules were seen in the proto- 

 plasm of a narrow form. Some of the large intracorpuscular 

 forms showed a deeper blue outer zone and a central paler 

 area in the protoplasm, within which was the macronucleus. 

 Short filarise were also present. 



In a fourth bird shot in October at Eidsvold, besides a 

 few halteridia, intracorpuscular trypanosomes were also 

 present. In one pale form, a few fine deep blue granules 

 were present in the protoplasm. One free body was seen 

 somewhat resembling a broad trypanosome without undu- 

 lating membrane or flagellum ; its body was pale blue and 

 vacuolated with purplish nuclear fragments near the centre 

 and at one end a broad deep purple dot (micronucleus). 



Free and Intracorpuscular Trypanosomes of Oriolus 

 Sagittarius (M. 850). Free trypanosomes were found in a 

 bird of this species shot at Eidsvold in January, and intra- 

 corpuscular forms in the same bird and also in two obtained 

 in April and May. The free trypanosomes were deep blue 

 and very narrow; they showed a central macronucleus and 

 a marked micronucleus near the posterior end : a narrow 



