hay Ry 
SUBORDER MALLOPHAGA. 209 
ing from tne middle line a little more than halfway to the margin. 
They are hardly as conspicuous as in scalaris, and apparently rather 
longer and more conspicuous than in pilosus,' 
Piaget «lescribes two varieties of this species, one from the Burchell’s 
zebra (Zquus burchelli) which he calls var. ocellata on account of a 
series of eye-like uncolored spots on the abdomen, and the other from 
the small horses of Java, var. tarsata, which has the second joint of 
the tarsi particularly developed, and which he mentions as in some 
respects approaching pilosus. 
The habits of this species are well known and have received mention 
for many years. ‘They seem to accumulate more particularly upon 
colts or horses in pasture, but their presence becomes most manifest in’ 
the latter part of the winter, when they may become so numerous as 
to cause great irritation to the animals infested. They occupy more 
particularly the region of the neck, and also accumulate around the 
base of the tail and between the legs, and the animals will frequently 
rub bare places in these regions in their attempts to rid themselves 
from the irritation. 
Itis unnecessary to give any special notice regarding treatment, as 
they must be attacked on the same plan as 
other species. 
Even if it proves that this species does not 
ordinarily infest the mule or donkey, it would 
be policy not to allow these animals, if infested, 
to associate with horses, as we have no assur- 
ance as yet that they can not thrive on any 
members of the equine family. 
BITING LIcE oF CATTLE. 
( Trichodectes scalaris Nitzsch.) 
This species, which is a very abundant one 
upon cattle and occurs the world over, appears 
to have been first technically described by 
Linneus (System. Naturze, VII, p. 1017, No. 9) 
under the name of Pediculus bovis, and evi- 
dently the same species is referred to under the 
name of Pediculus tauri (Fauna Suecica, 1946), F16.134.—Trichodectes sealaris— 
Notwithstanding these descriptions, both of ri nt eee 
which were under a different genus from that in 
which it is now placed, the species was again described by Nitzsch 
(Germar’s Magazine, III, 296) under the name of Trichodectes scalaris, 
and it has been known by this name in all of the numerous writings 
subsequent to this description. It has been treated by all writers 
‘The hair line in the figure is about one-fifth longer than it should be, 
4653—No, 5 14 
ee ee 
