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



(21) Microfilaria sp. from the White-winged Chough, 

 Gorcorax melanorhamphus, Vieill. (Dr. Bancroft, 

 Eidsvold, April 1911, May 1911.) 



Length 58 to 120 /*, breadth 3*5 to 4 /x. There appeared 

 to be two different kinds of embryos from this host, but as 

 the difference was mainly in regard to size, we have 

 regarded them as belonging to the same species. The 

 anterior end was rounded, the tail short and tapering. 

 Transverse striations were distinctly recognisable. The 

 spots lay at about 32, 54 and 83 per cent, of the body 

 length. 



We desire to thank Dr. Bancroft of Eidsvold, Queensland, 

 and Mr. L. Harrison of Sydney, for their kindness in for- 

 warding films, and the latter gentleman for identifying 

 many of the birds for us ; also Mr. W. A. Birmingham of 

 the Bureau of Microbiology, Sydney, who drew the figures 

 from our originals. 



The following is a summary of the results given in the 

 accompanying tables. 



Haematozoa were not detected in 84 species of Australian 

 birds, comprising 146 individuals, as well as 2 introduced 

 species comprising 3 individuals. 



In 17 species of Australian birds found to be harbouring 

 halteridia, these were found in 44 individuals out of 87. 



In 9 species of Australian birds, various phases of trypano- 

 somes were found. Of 66 individuals examined, 3 showed 

 free trypanosomes, 17 intracorpuscular forms, and 8 both 

 forms, i.e. 28 out of 70 were infested. 



In 21 species of Australian birds filarial were found, being 

 present in 31 individuals out of 70. 



Out of 70 birds belonging to the 9 species in which 

 trypanosomes in various phases were found, 15 showed 



