416 Biologn of Ixodulae 
Nymph to Adult. 
Hate on which 
gorged tick 
dropped from 
host 
Adult 
emerged 
Ticks 
main¬ 
tained 
Lot 
Host 
after 
at 
Remarks 
N. 1732 
Calf 
21. XI. 1913 
18 days 
30° C. 
[Note :—Lounsbury (1) gives the period 
J? 
Ram 
12. III. 
19 
9f 
of 18-28 days when incubated; 77 days 
Ram 
7. IV. 
21 
if 
in winter. In his later paper (2) he 
N. X 
Goat 
11. VI. 1906 
44 
37° C. 
gives 20 days at 30-33° C., 28-98 days 
at lower temperatures. Moulting is 
retarded at temperatures above 35° 
(35-41° C.)] 
Observations relating to oviposition of A. hebraeum. 
Lot N. 1732. Females fed on a calf and sub.sequently maintained at 30° C. 
Female 
No. 
Date when ? 
dropped from 
host 
Oviposition 
began after 
Oviposition 
lasted 
Days ? sur¬ 
vived after 
ovipos. ceased 
No. of eggs 
laid per $ 
1 
7. V. 1913 
9 days 
32 days 
8 days 
13,537 
2 
7. V. 
10 
31 
6 
15,327 
3 
9. V. 
11 
33 
4 
15,228 
4 
19. V. 
11 
34 
4 
12,300 
5 
20. V. 
9 
35 
4 
16,102 
6 
20. V. 
9 
30 
5 
16,530 
7 
27. V. 
11 
31 
13 
— 
8 
27. V. 
11 
35 
15 
— 
9 
29. V. 
12 
25 
2 
— 
10 
7. VI. 
9 
33 
3 
— 
11 
18. vn. 
9 
27 
7 
— 
12 
18. vn. 
10 
23 
6 
— 
13 
19. vn. 
9 
31 
6 
— 
14 
19. vn. 
8 
29 
5 
— 
15 
19. vn. 
8 
29 
7 
— 
16 
19. vn. 
9 
24 
13 
— 
17 
19. vn. 
9 
26 
4 
— 
18 
20. vn. 
8 
35 
4 
18,500 
19 
20. vn. 
8 
35 
1 
— 
20 
20. vn. 
9 
29 
7 
— 
21 
21. vn. 
9 
29 
2 
— 
22 
21. vn. 
9 
27 
4 
— 
Note :—To the foregoing we may add the following observations by Lormsbury (1). He 
observed the process in 3 $ which abandoned the host 18. v. 1898; oviposition began 
after 70-74 days and lasted 51-55 days; this was in winter. In summer, oviposition 
began after 14 days and lasted 42 days. When incubated, the ticks oviposited for 
21 days. Lounsbury describes the process of oviposition (I have also observed it; 
it takes place as in other ticks; see Nuttall, vn. 1908). Lounsbury states that his 
assistant Fuller computed the number of eggs laid by a $ at 17,500 and believed 
a 5 might lay from 10,000 to 20,000 eggs. One $ was seen to lay 370 eggs in 24 houis, 
averaging one egg every 3| minutes during that period. Lounsbury has seen eggs 
being laid at the rate of one in 55-56 seconds.] 
