990 REPORT—1905. 
larvee have remained active for nearly seven nionths. Some unfed nymplis 
that dropped as larvee from oxen in late July of last year, and some unfed 
adults that dropped as nymphs on April 2 and 3, 1904, are alive at the 
time of writing (August 10,1905). #. mitens may be only a varietal form 
of the last species, but we think it distinct. The habits are very similar, 
but more specimens of the adult are found on the face, and the nymphs 
appear to take longer to feed. 
The behaviour of #. evertst is unlike that of any vther tick, so far 
as we know. The first moult is passed on and the second off the host. 
The species appears a general feeder on mammals, being common on 
farm animals and taking readily ‘to the dog, rabbit, and hare; but 
whatever the host, the larva and nymph are rarely found except deep within 
the ear. The adult is rarely, if ever, found in the ear, but by choice 
attaches in the vicinity of the anus or to other hairless oily parts. The 
adult-larva stage has taken twenty-nine to ninety-five days at ordinary 
temperature. The nymph comes away eleven days or more after the attach- 
ment of the larva, and the adult female six days or more after being applied 
with a male. The nymph-adult stage takes only eleven days in the in- 
cubator, but our lowest ordinary temperature record is twenty-three days. 
Lurhipicephalus capensis is common on many parts of the body of 
the ox, goat, horse, and dog as an adult, though particularly in the case 
-of cattle, on the dewlap, udder, and tail. The larva appears much less 
easily suited, and numerous attempts to feed it on the goat and ox have 
failed, not one in ten thousand specimens distending itself. On the dog 
the larva feeds very satisfactorily, but, curiously, applications to very 
young pups have usually failed. The nymph feeds freely on the ox. The 
adult-larva stage in our rearings has taken forty three days and upwards, 
the larval feeding three days and over, the larval-nymph stage twenty- 
three days at office temperature, the nymphal feeding three to five days, 
the nymph-adult stage twelve days in the incubator, and the adult female 
feeding seven days. 
Our attempts to rear Z#. simus have shown that the larva of this 
species is also hard to please. The adult attacks and develops on many 
animals, but seems to do much better on the dog than on cattle, horses, 
goats, or sheep. It is found all over the body of the dog, but usually only 
about the feet and tail of the ox, so far as we have noticed. The nymph 
feeds readily on the ox, but very few of the innumerable larve that we 
have applied in various tests have fed on this animal. The dog is suitable 
as a host for all three stages, and the larva has seemed to do well on the 
rabbit. Our only adult-larva record preserved shows a duration of fifty- 
three days for this stage. The larva has fed to repletion in two days, the 
nymph in three, and the adult female in nine. Larve have moulted in 
the incubator in six days, nymphs in fourteen. This species appears to 
require greater warmth and humidity than the other South African species 
of Lurhipicephalus, and in Cape Colony seems practically confined to 
coast districts in the summer rainfall area, 2. appendiculatus extends 
its range much farther towards the dry interior, and Z. capensis still 
farther, whilst 2. evertsi seems able to flourish in parts of the Karroo 
too dry for any of its cattle-infesting congeners. Under ordinary con- 
‘ditions it is probable that all the species pass through two generations in 
a year. 
The three South African species of Lvophilws remain affixed to the 
host during both moults, as do the species of Boophilus that have been 
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