308 
Piroplasmosis 
it is, however, relatively rare. Although I have received blood-films 
from horses suffering from biliary fever in other parts of the world, none 
of the films contained parasites similar to P. caballi^. 
Ovine Piroplasmosis. 
True piroplasmosis, due to P. ovis, has been observed in sheep in 
Italy, Turkey, Roumania and Transcaucasia. I have been informed that 
it has recently been discovered in Egyptl The recorded presence of 
ovine piroplasmosis in S. Africa and N. America is due to errors of 
observation. It has been demonstrated by experiment that Rhipicephalus 
bursa conveys the disease. The geographical distribution of this tick, 
judging from specimens which have reached me, appeal’s to be limited 
chiefly to Southern Europe, the Islands in the Mediterranean, Transcau¬ 
casia, and North Africa, although Neumann states that it occurs both in 
E. and W. Africa as far as the Cape and also in the West Indies. I have 
only seen P. ovis in blood-films from Roumania and Italy. 
Fig. 5. Haemaphysalis leachi S . (Original, G. H. F. N. del.) 
Fig. 6. ,, 
1 On 17 January, 1913, Dr S. T. Darling, Chief of the Department of Sanitation, 
Ancon, Panama, sent me a blood-film showing P. cahalli taken from a horse in Panama. 
The ticks he sent us for determination and which were taken from the horse were 
Dermacentor nitens and Amblyomma cajennense —it is probable that the former is the 
carrier, since it is usually found on horses. 
- In blood-films I have received (5. vi. ’13) from Mr F. E. Mason of Cairo, we have 
only been able to detect a few small single intracorpuscular parasites, none of which were 
typical of true piroplasms. 
