MALARIA EXPEDITION TO NIGERIA 
TABLE IX 
63 
Natives of 
tongatabu 
Natives of 
Normuka 
Natives of 
Lifuka 
Natives of 
Vavau 
Totals 
Males examined : 
No. 
exnni. 
No. 
infect. 
Per- 
centage 
No. 
exam. 
No. 
infect. 
Per- 
centage 
No. 
exam. 
No. 
infect. 
Per- 
centage 
No. 
exam. 
No. 
infect. 
Per- 
centage 
No. 
exam. 
No. 
infect. 
Per- 
centage 
Day and night 
7 
3 
2 5 
1 2 
2 3 
1 2 
55 

2 7 
49 
Day only... 
3 
0 
3 
O 
2 
' 
8 
I 
Night only 
3' 
1 1 
9 
3 
6 
5 
4 
60 
2 3 
+ 1 
H 
3+'' 
37 
15 
40-5 
3i 
18 
57 
4 
28 6 
123 
5 1 
4*'47 
Females examined : 
Day and night . . . 
4 
3 
26 
7 
1 1 
3 
4 1 
' 3 
3 5 '7 
Day only. • • • • ■ 
3 
0 
6 
0 
9 
0 
Night only 
1 7 
2 
1 1 
1 
7 
2 
6 
0 
4 1 
5 
2 4 
5 
20-8 
+ 3 
8 
1 8-6 
18 
5 
28 
6 
0 
9' 
18 
19.9 
Totals for whole 
population 
65 
19 
29-23 
80 
23 
28.75 
49 
2 3 
47 
20 
4 
20 
214 
69 
32-24 
TABLE X 
Name 
A.M. 
P.M. 
9i 
10 
1 2 
2 1 
si 
8* 
10 
Tubon 
2 1 
9 
16 
1 7 
3° 
Saen 
22 
2 7 
16 
Kesaia 
80 
56 
The numbers represent the number of embryos in a drop of blood under a 
seven-eighths inch circular cover glass. 
Referring to the day and night examinations, Thorpe says that no periodicity 
was observed : that the embryos resembled F. nocturna ; they had a sheath, and 
exhibited the characteristic preputial collar and V-spots. He gives a number of 
measurements which correspond to those of F. nocturna, except that the worm appears 
to be a little smaller than that ot China and India. In ninety-six cases examined, all 
