452 
Biology of Ixodidae 
The time required by R. sanguineus for metamorphosis. 
Egg to Larva. 
No. of Lot 
Eggs 
laid on 
Larvae emerged Eggs main- 
after tamed at 
Remarks 
N. 2.37 
29. m. 
1906 
75 days ca. 12° C. 
[Metamorphosis takes 7- 
N. 1932 
28 days, according to 
Progeny of 
authors.] 
24. n. 
1913 
18 days 30° C. 
2 
f9 
18 
3 
99 
18 
4 
99 
17 
5 
25. II. 
1913 
16 
6 
99 
16 
7 
99 
16 
8 
24. n. 
1913 
18 
9 
25. II. 
1913 
17 
10 
99 
17 
11 
9 1 
17 
12 
99 
17 
13 
95 
17 
14 
99 
19 
15 
99 
19 
10 
99 
19 
17 
99 
18 
18 
99 
17 
19 
99 
19 
20 
99 
17 
21 
99 
19 
22 
99 
19 
23 
26. II. 
1913 
18 
24 
27. „ 
17 
25 
28. ,. 
22 
26 
27. „ 
18 
27 
,, 
19 
N. 1932 2nd genera¬ 
21. I. 
1914 
17 
tion descended from 
$ 6. Progeny of 16 ^s 
mixed. 
Larva to Nymph. 
No. of Lot 
Host 
Date on which 
gorged larvae Nymphs Ticks 
dropped off emerged maintained 
liost after at Remarks 
N. 237 
Rabbit 
22. 
X. 
1906 9 days 
? [Metamorphosis 
N. 1932 
takes 8-10 
Progeny of $ 2 
Dog 
25. IV 
1913 6-7 days mostly 
30° C. days, according 
8 
99 
10. 
IV. 
8 „ ,, 
„ to authors.] 
6 
99 
15. 
IV. 
6 „ „ 
99 
27 
99 
2. 
V. 
6 ,, „ 
99 
1 
9? 
27. 
V. 
^ 99 99 
99 
N. 1932 2nd generation 
Jackal 
6. 
XI. 
7 
* 99 99 
99 
descendants of ^ 6. „ 2G. vi. 1914 7 
Progeny of several $s. 
