G. H. F. Nuttall 
70 
to the skin of my leg where it remained and partially gorged itself 
during a period of a week when it dropped off of its own accord, 
A note on the effect of this tick’s bite is appended to this section. 
Nymphs. 13 unfed nymphs were placed upon a duck, 12 on the 
gull and 12 on a young sparrow and canary. A few of them attached 
themselves to the duck, but all of these died in situ like the females. 
Larvae. Unfed larvae which hatched out in the laboratory, although 
lively, refused to remain upon any of the hosts upon which they were 
tried. 
Since our efforts to raise the tick under experimental conditions 
gave negative results it is impossible to make any statements with 
Time required for metamorphosis. 
Egg to Larva, The time being calculated from the date on which the first eggs were laid 
to the date when the first larvae appeared. The data here tabulated are based on 
the ofispring of the females of Lot 1703 and each batch of eggs bears the maternal 
number. Eggs maintained at 12° C. during metamorphosis. 
Eggs of 
¥ Tick No. 
Eggs laid on 
Larvae emerged 
Time 
in days 
1 
3. VIII. 1912 
18. XI. 1912 
107 
2 
19. VII. 
11. X. 
84 
3 
10. vm. 
7. XI. 
89 
4 
24. vn. 
21. X. 
89 
5 
27. VII. 
5. XI. 
101 
7 
3. VIII. 
18. XI. 
107 
9 
27. VII. 
21. X. 
86 
11 
9. VIII. 
30. XI. 
113 
12 
25. VII. 
23. X. 
90 
15 
30. VII. 
5. XI. 
98 
16 
20. vn. 
21. X. 
93 
17 
27. VII. 
7. XI. 
103 
18 
16. VII. 
9. X. 
85 
19 
29. VII. 
30. X. 
93 
20 
29. VII. 
30. X. 
93 
23 
27. VII. 
23. X. 
88 
25 
29. VII. 
5. XI. 
99 
26 
24. VII. 
18. X. 
86 
27 
12. VII. 
21. X. 
101 
28 
3. VIII. 
7. XI. 
96 
30 
9. VII. 
15. XI. 
129 
Larva to Nymph. From 51 gorged larvae (Lot 1307), collected on 2. vii. 1911, the nymphs 
emerged 4-17 days after the date of collection, at 12° C. 
Nymph to Adult. From 31 gorged nymphs (Lot 1307), collected on 2. vii. 1911, the adults 
emerged 6-39 days after the date of collection, at 12° C. 
