105 



(9) . Occupying more than three-f ourths of red cell (whole 

 of one side and both ends) ; nucleus of host pushed 

 a little to one side; stains fairly well, finely granu- 

 lar; its nucleus not stained; melanin as one large 

 and two smaller masses in centre. 



Halteridium, sp. from Melithreptus atricapillus, Lath. 

 (Syn. M. lunulatus, Shaw), (Fam. Meliphagidce). 

 Plate xxv., figs. 6-10. 

 Halteridia were detected in films from a bird shot in the 

 Sydney district in July, 1909. The parasites, though rather 

 large, did not displace the host nucleus. Their protoplasm 

 was very lightly stained, the nucleus when visible being a 

 pale-pink (Giemsa). The latter was either a narrow elongate 

 or a rounded structure, placed medianly or nearly so. 

 Granules were rather small and numerous in the more deeply- 

 staining parasites, while they were fewer and larger in the 

 pale forms. 



Halteridium, sp. from Zosterops cozrulescens (Fam. 

 Zosteropidce). 

 Plate xxv., figs. 11-17. 

 The two birds harbouring this parasite were shot in 

 February and in April, 1910, near Sydney. Blood-films from 

 them were, unfortunately, ill-prepared, so that the structural 

 peculiarities of the parasite were not readily distinguishable. 

 The chief points noticed were its large size, occupying often 

 five-sixths of the available space in the erythrocyte. The host 

 cells themselves often showed definite enlargement with dis- 

 tinct displacement of the nucleus. 



THE TRYPANOSOMES OF AUSTRALIAN BIRDS. 



Trypanosoma anellobi^;, n. sp. from Anellobia chrysop- 



tera, Lath. (Syn. A. mellivora, Lath., Fam. 



Meliphagidce). 



Plate xxvi., figs. 6, 11. 

 We are indebted to Dr. T. L. Bancroft for sending us 

 "blood-films from eleven birds belonging to this species shot 

 near Brisbane. In four of these no parasites were detected, 

 in three large microfilariae were present ; in two there were 

 two species of microfilariae, a small form in addition to the 

 larger (vide infra); while in two others there were two kinds 

 of filarial embryos as well as a few trypanosomes. Dr. Ban- 

 croft detected the presence of these hsematozoa in some of the 

 :films before sending them down to us. 



