308 
Trypanosoma leivisi 
TABLE I. 
Giving results of examination of M. rattus for trypanosomes. 
Males 
Females 
Total* 
Monthly 
periods 
Exam¬ 
ined 
In¬ 
fected 
Per¬ 
centage 
Exam¬ 
ined 
In¬ 
fected 
Per¬ 
centage 
S’ 
Exam¬ 
ined 
In¬ 
fected 
Per¬ 
centage 
September 1905 
97 
38 
39-2 
117 
41 
3.5-0 
302 
106 
35-0 
October 
137 
71 
51-8 
114 
61 
53-5 
251 
132 
52-6 
November 
101 
48 
47-5 
80 
44 
55-0 
191 
94 
49-2 
December 
121 
58 
47-9 
118 
54 
45-8 
239 
112 
46-9 
January 1906 
116 
55 
47-4 
131 
42 
32-1 
247 
98 
39-7 
February 
82 
29 
35-4 
93 
21 
22-6 
175 
50 
28-6 
March 
69 
10 
14-5 
78 
14 
17-9 
147 
24 
16-3 
April 
68 
16 
23-5 
69 
13 
18-8 
137 
28 
20-4 
May 
42 
11 
26-2 
50 
16 
32-0 
92 
27 
29-3 
June 
118 
59 
50-0 
89 
55 
61-8 
207 
114 
55-0 
July 
93 
58 
62-4 
81 
44 
54-3 
174 
102 
58-6 
August 
84 
51 
60-7 
112 
74 
66-0 
196 
125 
63-8 
September 
73 
45 
61-6 
84 
48 
57-1 
157 
93 
59-2 
October 
72 
43 
59-7 
64 
40 
62-5 
136 
. 83 
610 
* These columns include a number of rats in which the sex was not noted. 
TABLE II. 
Giving results of examination of M. decumanus for trypanosomes. 
Males 
Females 
Total * 
Monthly 
Exam- 
In- 
Per- 
Exam- 
III- 
Per- 
Exam- 
In- 
Per- X 
periods 
ined 
fected 
centage 
inert 
fected 
centage 
ined 
fected 
centage 
September 1905 
59 
32 
54-2 
66 
29 
43-9 
196 
70 
35-7 
October 
128 
43 
33-6 
101 
33 
32-6 
229 
76 
33-2 
November 
81 
37 
45-7 
72 
44 
61-1 
183 
87 
47-5 
December 
94 
49 
52-1 
94 
44 
44-4 
208 
93 
44-7 
January 1906 
85 
39 
45-9 
110 
46 
41-8 
219 
85 
38-8 
February 
49 
7 
14-3 
63 
17 
27-0 
112 
24 
21-4 
March 
52 
6 
11-5 
43 
14 
32-5 
95 
20 
21-0 
April 
35 
2 
5-7 
39 
3 
7-7 
77 
5 
6-5 
May 
8 
i 
12-5 
10 
2 
20-0 
18 
3 
16-6 
June 
55 
29 
52-7 
47 
22 
46-8 
102 
51 
50-0 
July 
61 
25 
41-0 
52 
32 
61-5 
113 
57 
50-4 
August 
52 
26 
50-0 
60 
35 
58-3 
112 
61 
54-5 
Sejitember 
40 
22 
55-0 
34 
16 
47-0 
74 
38 
51-4 
October 
47 
28 
59-5 
47 
26 
55-3 
94 
54 
57-4 
* These columns include a number of rats in which the sex was not noted. 
