450 
Biology of Ixodulae 
The following protocols relate to my raising experiments conducted 
in Cambridge 
The time Rhipicephalus sanguineus remains upon the host. 
Larvae. 
No. of Lot 
(Progeny of 
separate 
Date when 
No. of gorged 
larvae collected 
on successive 
Host main¬ 
tained at 
average 
Remarks 
¥s) 
Host 
put on host 
days 
temp, of 
N. 237 
Rabbit 
18. X. 
1906 
— on day 4 
14° C. 
[Larvae feed 
N. 1932 $ 6 
Dog 
12. IV. 
1913 
194 on day 3 
845 „ 4 
131 „ 5 
18 „ 6 
4 „ 7 
6-5° C. 
for 3-8 days, 
according to 
authors.] 
N. 1932 $ 2 
Dog 
22. IV. 
1913 
352 on day 3 
236 „ 4 
23 5 
2 „ 6 
13° C. 
N. 1932 $ 7 
Dog 
29. IV. 
1913 
16 on day 4 
98 „ 5 
162 „ 6 
111 » 7 
20 ,, 8 
12° C. 
N. 1932 ? 1 
Dog 
24. V. 
1913 
7 on day 3 
43 „ 4 
2 „ 5 
20° C. 
N. 1932 $ 3 
Dog 
2. VI. 
1913 
120 on day 3 
91 „ 4 
3 „ 5 
13 „ 6 
11 „ 7 
19° C. 
