G-. H. F. Nuttall 
437 
IXODES PUTUS. 
(Additional notes to Part I {Parasitology, vii. pp. 83-84.) 
In the record relating to the longevity of nnfed larvae, nymphs and 
adults of this species, published in Part I, some specimens, N. 1703, were 
still alive when the proof of the paper was passed for press. The 
following protocols complete those previously published since they give 
the day on which the last survivors of each lot were found dead. 
Lonyevity of unfed I. pntns. 
The time in each case is reckoned from the date of last ecdysis. 
The ticks were maintained in semi-darkness in a cupboard and at room 
temperature ranging from about 12° C. in winter to 18° C. in summer. 
Larvae. 
Progeny 
of $ No. 
Date of emergence 
Day on which the last 
survivors died 
1 
18. XI. 1012 
197 days 
.3 
7. XI. 
205 
4 
21. X 
191 
5 
5. XI. 
150 
7 
18. XI 
196 
9 
21. X. 
225 
11 
.30. X. 
184 
12 
23. X. 
237 
15 
5. XI. 
209 
16 
21. X. 
224 
18 
9. X. 
236 
19 
30. X. 
215 
20 
30. X. 
214 
25 
5. XI. 
209 
26 
18. X. 
226 
28 
7. XI. 
208 
Nymphs. 
Lot No. 
35 
4. VII. 1912 
364 days 
Females. 
32 
ca.l7. VII. 1912 
351 days 
33 
99 99 
378 
Summmy. 
The longest period which unfed larvae survived was 237 days, whilst 
nymphs survived up to 364 days, males up to 376 days (see Part I, p. 84) 
and females up to 378 days. 
