108 
Biolo(jy of Ixodidae 
Tiuie required fur nietamurpliosis. 
Egg to Larva. 
First larvae 
Temp, at which 
Lot 
First eggs 
emerged 
eggs were 
laid on 
after 
maintained 
Kemarks 
X 
23. VI. 1906 
44 days 
1(5° C. 
Italian ticks. 
1305 
igeny of ? No. 1 
29. II. 1912 
35 days 
18° C. 
Algerian ticks. 
2 
2. III. 
44 
,, 
3 
29. 11. 
41 
4 
3. III. 
39 
»} 
.5 
4. III. 
42 
j) 
6 
4. III. 
40 
1 i 
7 
2. III. 
46 
,, 
9 
3. III. 
49 
12 
4. III. 
49 
,, 
13 
4. III. 
39 
14 
5. III. 
52 
15 
5. III. 
46 
,, 
16 
4. III. 
51 
17 
5. III. 
49 
? i 
18 
4. III. 
51 
?» 
19 
5. III. 
49 
? ? 
20 
9. III. 
45 
21 
20. V. 
45 
19° C. 
22 
20. V. 
46 
,, 
23 
21. V. 
48 
11 
Larca tu Nymph. When goryed larvae drop off the host (metamorphosis off the host). 
No. of Lot 
1305a Host 
florged larvae 
first dropped 
off host on 
15 
5 
13 
Earn 21. xi. 1912 
Hedgehog 4. ix. 
Hedgehog 23. x. 
Tick main¬ 
tained at 
19° C. 
Days which 
elapsed before 
nymphs emerged 
16 
20° C. 20 
21° C. 3-8* 
* The shortness of the period apparently required for metamorphosis in this case may 
be attributable to gorged larvae dropping off the hedgehog after partial metamorphosis. 
The observation on the ram must, therefore, be accepted as more trustworthy. 
When unfed nymphs drop off' the host. 
Larvae put on 
liost on 
Unfed nymphs 
collected 
13 
Hedgehog 
IG. X. 1912 
25 on daj 20 
Hedgehog iu 
19 „ 
21-23 
room at 13‘5° 
17 „ 
24-26 
16 „ 
27 
4 „ 
28 
2 „ 
29 
Nymph to 
No. of Lot 
1305 a 
Adult. 
Host 
Gorged nymphs 
first dropped 
off host on 
Ticks main¬ 
tained at 
Days wluch 
elapsed before 
adults emerged 
— 
Hedgehog 
21. X. 1912 
14° C. 
95 
5 
< » 
3. X. 
18° 
C. 
20 
13 
5 ? 
17. XI. 
37° 
C. 
23-15 
