U. H. F. Nuttall 
481 
No. of gorged nymphs 
collected on 
successive days 
3 on day 8 
4 „ 9 
3 „ 11 
5 „ 12 
1 „ 13 
2 „ 14 
3 „ 15 
2 „ 17 
The first adults emerged on 10. ii. 1914, i.e. metamorphosis from 
nymph to adult lasted 28 days at 30° C. 
Longevity of unfed ticks: larvae which emerged 7. xi. 1913, died in 
43 days. Nymphs which emerged 11. xii. 1913, died after 34 days (at 
room temperature). 
My results agree with those of the American authors, but the 
nymphs remained longer upon the host. 
HAEMAPHYSALIS CONCINNA. 
The only observations on the biology of this species are by Brumpt 
in France, who has kindly supplied me with his ms. notes thereon. 
Brumpt has found the adults only upon deer, attached in the cervica,! 
region, especially along the mane, occasionally at the base of the ears, 
and rarely elsewhere. When placed experimentally upon dogs, they 
attached themselves anywhere. The sexes are found attached close 
together upon deer. Nymphs and larvae were found by Brumpt on 
deer and hedgehog and it is probable that they occur on other mammals; 
they attach themselves anywhere upon the hosts mentioned. 
Time the tick remains upon the host. 
The larvae, a few days after emergence, attach themselves quickly 
to a variety of hosts (deer, hedgehog, dog, guinea-pig, rat, mouse) and 
gorge themselves with blood or lymph in 3-10 days; nearly all of them 
abandon the host in 3-5 days. 
The nymphs, a few days after emerging, attach themselves to the 
same hosts as do the larvae and feed to repletion in 3-12 days, mostly 
abandoning the host in 4-5 days. 
The adults after fasting for weeks or months, attach themselves to 
the host whereon they copulate, probably after 4 days, for the sexes 
are then found attached close together with their venters juxtaposed. 
