•294 
Tick Paralysis 
Oviposition (1912). 
15 VII. 51 eggs laid. 
15-16 VII. 479 eggs laid. 
From 12.30 noon to 3.20 p.m., 66 eggs were laid, which equals 
2‘5 minutes for each egg. From 5.15 p.m., to 12 noon on the following 
day a female laid 474 eggs, which equals 2'3 minutes for each egg. 
Longevity. 
A partly gorged female taken from a lamb on 5 vi. 1913 was still 
alive on 24 vil. 1913 (a period of 49 days). A fully gorged female 
which dropped off a lamb on 25 IV. 1913 was still alive on 24 vii. 1913 
(a period of 89 days). 
Two unengorged females were alive and active after 50 days, and 
attached themselves to two different animals. 
Summary. 
Duration of parasitism upon the host. 
The larvae remain upon the host four days, nymphs 4-9 days, females 
4-10 days (average for six ?s = 6'5 days). The time required for meta¬ 
morphosis from egg to larva = 36 days, at summer temperature ; gorged 
larva to nymph = 24-38 days at summer heat ; gorged nymph to 
adult = 32 days (in summer) to 84-94 days in a cold room in winter. 
The pre-oviposition period lasted eight days in summer and four, five 
and six days in the case of three $s with intermittent heat in an 
incubator at 32° C. 
The process oi cnpulation, observed on a lainb’s back, lasted 33 
minutes. The males copulate with semi-gorged females. 
Inc7'ease in weight of through feeding. 
Three unfed $s averaged O'OOl gramme; three replete $s averaged 
0'587 gramme in weight. 
Oviposition: A $ was observed to oviposit as follows: 
Beginning on 15 Vll. 1912, the first day, she laid 51 eggs; first to 
second 479 eggs (66 eggs or 2'5 minutes per egg laid between 12.30 p.m. 
to 3.20 p.m.); from 5.15 p.m. on second day to 12 noon on third day she 
laid 474 eggs, or 2’3 minutes for each egg. 
