30 



pigment, and surrounded the host-nucleus, leaving only a thin- 

 rim of protoplasm externally. 



(9) Ilalteridhnn of Ptilofis chrysops. — In a blood-slide 

 made from one of these birds, shot at Milson Island, in the 

 Hawkesbury River, in November, 1914, numerous Halteridia 

 and a few trypanosomes were detected. The Halferidia, which 

 we have previously recorded from this species, presented no 

 special features, occupying one side and most of both ends of 

 the affected host-cells, and showing coarse grains of pigment, 

 collected into groups, sometimes at one end only, sometimes at 

 both ends, and sometimes in the middle. 



(10) HaUeriditim of Ptilotifi 'peniciUata. — In a specimen 

 of this honey-eater, obtained at Overland Corner, Murray 

 River, South Australia, a few Rcdteridia were detected, some 

 mature, some half-grown. Pigment was present as large 

 granules. 



(11) licdferidlvm of Acanfhor/enys I'ufigidaris (Spiny- 

 cheeked Honey-eater). — A few Jhdierldki have been detected 

 in blood -films from one of these birds obtained at Cobar in 

 October, 1911, and in another shot at Merrool, near Yanco, 

 in October, 1912. In the latter case, l.eucocytozoa were also 

 present . 



III. — Leucocytozoa ("Intra-corpuscular Trypanosomes( ?)")- 



In No. II. of our Haematozoa of Australian Birds, Dr. 

 Johnston and myself have described intra-corpuscular bodies 

 in the blood corpuscles of various Australian birds. We have 

 thought that these might be intra-corpuscular forms of the 

 trypanosomes with which they are often associated, and have 

 referred to them as such, or as Leucocytozoa. These rounded 

 parasites seem not uncommon in birds in other parts of the 

 world, and are usually referred to as ''Leucocytozoa," a term 

 which it seems preferable to use rather than a more or less 

 committal one, such as 'intra-corpuscular trypanosomes." All 

 the specimens we have so far examined from various birds are 

 of spherical form and seem specifically indistinguishable. The 

 following specimens have been examined snice our la?t 

 paper : — 



(1) Leucocytozoon of L'odargus striyoides. — In 1913 Dr. 

 Bancroft sent us slides from this Podaryui< from Eidsvold, 

 Queensland. Microfilariae were present, and in addition 

 moderately numerous male and female forms of a Leucocy- 

 fozooti, measuring 8"5 to 10"5 /a in diameter. We have not 

 previously recorded Leucocytozoon from this species of bird. 



(2) Leucocytozoon of MyzomeJa mnyuiv e olent a . — An addi- 

 tional bird, obtained by Dr. Bancroft in October, 1911, has 

 been found infected with Leucocytozoon, as well as with 

 trypanosomes, M icrofilariae , and Thdteridia. 



