G. H, F. Nuttall 
427 
The time D. venustus remains upon the host. 
Host 
Date when put 
on host 
Host 
kept at 
No. of gorged ticks 
collected on 
successive days 
Remarks 
Guinea-pig 
26. 
VII. 
1912 
21° 0. 
21 on 
day 
3 
27 
99 
4 
29 
99 
5 
14 
99 
6 
91 
Guinea-pig 
6. 
VIII. 
1912 
21° C. 
121 on 
day 
3 
26 
99 
4 
37 
99 
5 
1 
99 
6 
185 
Guinea-pig 
7. 
IV. 
1913 
— 
3 on 
day 
2 
Progeny of ? No. 1. 
473 
99 
3 
476 
Ram 
23. 
IX. 
1913 
— 
23 on 
day 
6 
Progeny of $ No. 2. 
Nymphs. 
Guinea-pig 
13. 
IX. 
1912 
19° C. 
1 on 
day 
5 
Nymphs had fasted 36 days 
6 
99 
6 
before being put on host. 
4 
99 
7 
7 
99 
8 
1 
99 
9 
2 
99 
10 
21 
Ram 
2. 
VI. 
1913 
— 
6 on 
day 
6 
Nymphs had fasted 46 days. 
10 
99 
7 
2 
99 
8 
4 
99 
9 
2 
99 
10 
3 
99 
11 
27 
Adults ($). 
Ram 
24. 
XI. 
1912 
0 ° c. 
1 on 
day 15 
3 and 4 $ were put on ram. 
99 
10. 
vn. 
1913 
— 
1 
39 
8 
3 (J and 3 $ were put on ram. 
Lamb 
14. 
IV. 
— 
1 
99 
5 
Recorded by S. Hadwen. 
99 
14. 
TV. 
— 
1 
39 
8 
99 99 99 
Parasitology vii 
28 
