96 
Biologji of Ixodidae 
Egy to Larva. 
Lot 
1 
2 
3 
1737 I 
Eggs laid on 
15. XII. 1903 
14. III. 1904 
2. V. 1904 
16. VII. -1. VIII. 1912 
Larvae emerged 
after 
63 days 
80 
58 
26-37 
Eggs main¬ 
tained at 
12^ C. 
13° C. 
20° C. 
See table relating to the progeny of 39 ?’s, etc. p. 97. 
Larva to Nymph. 
Lot 
Host 
Date on which 
gorged larvae 
dropped off host 
Nymphs 
emerged 
after 
Ticks 
maintained 
throughout at 
la 
Ferret 
13. VII. 
1904 
30 days 
17° C. 
15 
Eabbit 
10. . 
} 
33 
j > 
If 
Hedgehog 
11. „ 
32 
1 j 
Id 
Kid 
29. VI. 
1904 
44 
) > 
2 
Dog 
2. IX. 
1904 
35 
11 ° c. 
3 
Hedgehog 
23-24. X. 
1905 
39 
10 ° c. 
1737 I 
Jackal 
27-30. III. 
1912 
31 
24-26° C. 
mph to Adult. 
1 
Kabbit 
25. VII. 
1904 
Adults emerged 
after 
42 days 
14° C. 
2 
Hedgehog 
30. IV. 
1906 
70 
14° C. 
1737 I 
Jackal 
23. V. 
1912 
15-16 
24-26° C. 
Longevity of unfed ticks. 
The longevity of the unfed tick is reckoned from the date of its emergence from the egg 
in the case of the larva, from the larval skin in the case of the nymph, from the 
nymphal skin in the case of the adult. 
Larvae. 
Lot Date of emergence 
1 12. VIII. 1904 Still lively after 56 days at 13° C. 
2 29. VI. 1904 Dead after 44 days at 17° C. 
1737 I 12. VIII. 1912 Lively after 221 days at 12° C. 
Nymphs. 
1737 I 7. XII. 1912 Lively after 61 days at 12° C. 
Eeniarks 
In jar on earth. 
»» >> 
Progeny of 31 ?’s all lively 
after 119-221 days, in cork¬ 
ed tubes. (21. III. 13.) 
Then raised to adults. 
Adults. Eeceived vii. 1903 from Cape Colony, survived ea. 210 days at room temperature, 
and when placed on a dog produced fatal infection with piroplasmosis. 
Observations relating to oviposition, etc. 
Lot No. 
Hate when 
gorged females 
dropped from host 
Oviposition 
began after 
Ticks maintained 
at temperature of 
1 
X. 1903 
60 days 
Cool room. 
2 
i.-iii. 1904 
47 
j > 
3 
3. HI. ,, 
24 
4 
24. V. „ 
18 
16 ° c’. 
5-8 
IV.-V. „ 
14 
16-21° C. 
1737 I 
vii.-viii. 1912 
3-5 
23° C. * 
* This holds for 33 out of 35 ?’s, the two remaining oviposited on days 9 and 12 
respectively. 
