144 
E. A. MINCHIN AND H. M. WOODCOCK 
Owls. 
Parasites. 
No. 
From 
Date. 
Tryp. 
Halt. 
Lz. 
| Prot. 
1 1 
6 
Vienna 
Jan. 26 
7 
,, 
Feb. 21 
? 
+ 
— 
4- 
8 
99 
99 9 9 
+ 
+ 
4 
+ 
9 
99 99 
— ■ 
— 
— 
+ 
10 
Breslau 
March 17 
— 
— 
— 
— 
11 
99 
99 99 
— 
+ 
+ 
+ I 
12 
99 
99 99 
— 
— 
— - 
13 
Vienna 
Apr. 16 
+ 
+ 
+ 
4 - : 
14 
,, 
99 99 
+ 
+ 
4* 
~ ” i 
15 
99 
„ 27 
— 
— 
— 
16 
Breslau 
May 8 
— 
— 
— 
— . i 
17 
Vienna 
„ 23 
— 
— 
+ 
+ 
18 
„ „ 
- - 
— 
4 
— 
19 
„ 29 
4- 
+ 
+ 
4 
20 
June 5 
— 

+ 
— i 
21 
99 
„ 
— 
— 
— 
- | 
22 
yy 
„ 12 
— 
— 
4- 
23 
99 
99 99 
+ 
4 - 
+ 
+ ! 
1 
Total, 18 
5 (or 6 P) 
7 
10 
8 1 
1 ; 
Analysis and General Kemarks. 
Twelve out of the eighteen birds were infected with one or 
more parasites, the remaining six being, so far as could be 
ascertained, quite negative. Of tAie different forms of parasite 
the Leucocytozoon occurred most frequently, being present 
in ten instances. Hence, more than 55 per cent, of the owls 
we obtained were infected with this parasite — a high ratio. 
Proteosoma was present in eight birds, i. e. in more than 
a third. Halteridium occurred in seven owls, and trypano- 
somes in either five or six. It will be noticed that no trypano- 
somes were found in any of the birds from Breslau, but only 
in those from the neighbourhood of Vienna. 
With regard to the number of owls in which trypanosomes 
were present, we think it quite possible that owl 7, marked in 
the table with a query, may also have been infected, although 
trypanosomes were not actually found. Halteridia were also 
very scanty in owl 7. On the other hand, in owl 8 Halteridia, 
as well as most of the other parasites, were plentiful, and on 
