113 



775. Ptilotis chrysops, Hawkesbury River, April, 1909 (in 1 

 out of 2 examined) ; Sydney, July, 1909 (1, nil). 



787. Ptilotis plumula, Perth, W.A., 1909 (in 1 examined). 



799. Meliornis novie-hollandice, Sydney, March, 1909 (in 1 out 

 of 2), August, 1909 (1, nil), April, 1910 (1 nil), 

 July, 1910 (1, nil), August, 1910 (2, nil). 



818. Tropidorhynchus cornictdatus, Hawkesbury River, April, 

 1909 (in 1 examined). 

 Trypanosomes! were found in one species : — 



810. Anellobia chrysoptera, Hawkesbury River, September, 

 1909 (1, nil); Sydney, March, 1910 (1, nil); South- 

 East Queensland, July, 1910 (trypanosomes found in 

 2 out of 11 examined). 

 Microfilariae were found in three species : — 



647. Gymnorhina tibicen, Berry, May, 1909 (1, nil); Bowral, 

 May, 1910 (2, nil); Sydney, March, 1910 (in 1 

 examined); Berry, August, 1910 (in 1 examined). 



810. Anellobia chrysoptera, Hawkesbury River, September, 

 1909 (1, nil); Sydney, March, 1910 (1, nil); South- 

 East Queensland, July, 1910 (in 7 out of 11 ex- 

 amined) . 



847. Corone australis, Barabba, N.S.W., December, 1909 (in 

 1 out of 2 examined). 



List IV. 



List IV. includes an introduced species, in two members 

 of which we have found hsematozoa (Plasmodium passe ris, 

 Johnston and Cleland) : — 



Passer domesticus (sparrow), Richmond, N.S.W., May, 

 1909 (1, nil); Sydney, May, 1909 (in 2 examined); 

 Adelaide, May, 1910 (2, nil). 



It will be seen from the above lists that of 195 Aus- 

 tralian birds examined, representing ninety species, Halteridia 

 were found in twelve birds belonging to eleven species. The 

 percentage of infected hosts was thus about six. The 

 percentage of species found to be infected was about twelve. 

 Trypanosomes were found in two individuals belonging to one 

 species, the infection being about 0*5 per cent, of the total 

 number of specimens examined. In regard to microfilaria;, 

 we found them in ten birds belonging to three species. Thus 

 about 5 per cent, of the total number of birds examined 

 were found to harbour filarial embryos. Bancroft < 8 ) £n 1889 

 examined 114 birds belonging to fifteen species harbouring 



(8) Bancroft, T. L., Proc. Roy. Soc, Queensland, vi. (1889- 

 1890), pp. 58-62. 



