Gr. H. NUTTAIiL 
423 
Tim,e required by D. reticulatus for metamorqihosis at 30° C. 
Egg- to Larvae. 
Eggs laid on Larvae emerged after 
1. VI. 1913 12 days 
21. XI. 17 
16. XII. 19 
Larvae to 
Nymph. 
Host 
Date on wliich 
gorged larvae dropped 
off host 
Nymphs emerged 
after 
Ram 
11. VII. 1913 
5 days 
Nymph to 
Adult. 
Ho.st 
Date on which 
gorged nymphs dropped 
off host 
Adults emerged 
after 
Ram 
5. \TII. 1913 
12 days 
Observations relating to oviposition of D. reticulatus. 
The females were placed together with males upon a ram. 
Tick 
No. 
Date when gorged 
$ dropped from 
ram 
Oviposition 
began after 
Oviposition 
lasted 
Days ? survived 
after oviposition 
ceased 
No. of 
eggs laid 
per ? 
? maintained 
at aver ge 
temp, of 
1 
29. V. 1913 
3 days 
6 days 
21 days 
— 
30° C. 
2 
13. X. 
50 
15 
13 
X 
15° C. 
3 
22. X. 
24 
20 
0 
— 
— 
4 
22. X. 
26 
18 
0 
X 
— 
5 
26. X. 
38 
12 
0 
X 
— 
6 
27. X. 
24 
23 
0 
3994 
— 
7 
29. X. 
44 
— 
— 
X 
— 
8 
29. X. 
60 
23 
10 
X 
— 
The sign x in the 6th column denoted that the eggs failed to hatch. 
Longevity of unfed D. reticulatus. 
Larvae [Marzuiowski and Bielitzer saw mifcd larvae survive for 6 months]. 
Nymphs emerged on 16. vn. 1913 and survived only 37 days at 18° C. 
Adults emerged on 17. vm. 1913 (81 cJ, 110 $); 
1 survived for 474 days at room temperature. 
1 $ „ 450 „ „ „ „ 
Behaviour of the sexes upon the host. 
Observation 1. On 20. v. 1913, 1 $ and 1 $ were placed upon a ram’s scrotum. They 
attached themselves quickly at some distance from each other. After 24 hours the 
$ had not changed her position, the <J, partly fed, was wandering about. The ^ was 
removed, and, on '^7. v., again placed with the $ when copulation occurred 
at once. ' 
