36 
ones. For these reasons it would seem better, for the 
present at least, not to exculpate the parasites from 
lowering the animals' resistance. 
The progress of Dr. Weidman's work upon parrots 
pro ventricular spiroptera speaks for itself. There is 
every indication that shortly we shall be able to exclude 
j^Zana-bearing birds from the parrot house. That we 
shall learn something of their life history we hope. This 
is always a tedious and difficult task. It is to be ex- 
pected that any success we may have in treatment will 
be empirical or accidental and that a perfectly satisfac- 
tory method of cure and hygienic control must await 
our discovery of the life history and transmission. 
The following are the determined parasites aside from 
those in Dr. Weidman's reports : 
Weeper Cebus {Cebus capucinus) : 
Filaria gracilis in peritoneum. 
Burchell's Zebra {Equus hurchelli burchelU) : 
Ascaris megalotyphlon in duodenum. 
Black Bear ( Ursus americanus) : 
Ascaris transfuga in small intestine. 
Black-crested Cardinal {Guhernatrix cristata) : 
Proteosoma in red blood cells. 
Woolless Sheep {Ovis aries) : 
Tenia echinococcus in pericardium. 
Mule Deer (Mazama hemionus) : 
Cysticercus tenuicollis in peritoneum. 
Great Blue Heron (Ardea herodias) : 
Ascaris ardea in ceca. 
Observations on Parasites in Wild Cats. 
Dr. F. D. Weidman. 
During the past year special work has been done 
towards solving the cause of the high mortality among 
wild cats and parrots. 
The Wild Cats (Felis ruffus) : 
Since 1902 there have been nineteen deaths as shown 
by the following table: 
