/ 
LICE AFFECTING DOMESTIC ANIMALS. 
211 
,ay be true that Denny was the first one to give it a thor- 
iigh description and careful drawing. He speaks of it as 
Dmmon on the horse and ass, but Piaget says he has never 
rnnd it on the ass, and there is, of course, a possibility that 
)enny did not distinguish between this and the preceding 
lecies. 
In this species the head is decidedly rounded in front, the 
itennas inserted well back, so that the head forms a full 
^mi-circle in front of the base of the antennas. The abdomen 
more slender and tapering than in scalaris , but less so than 
i pilosus, as shown in Piaget’s figures. The color is much 
le same as in the allied species, the head, thorax, and legs 
eing a bright reddish brown or chestnut, and the abdomen 
f a dusky yellowish color, with about eight transverse dusky 
ands occupying the central or anterior portions of the seg- 
lents and extending from the middle line a little more than 
alf way to the margin. They are hardly as conspicuous as 
1 scalaris and apparently rather longer and more conspicuous 
lan in pilosus. 
The habits of this species are well known and have re- 
eived mention for many years. They seem to accumulate 
lore particularly upon colts or horses in pasture, but their 
resence becomes most manifest in the latter part of winter, 
Ten they may become so numerous as to cause great irrita- 
on to the animals infested. They occupy more particularly 
ie region of the neck, and also accumulate around the base 
f the tail and between the legs, and the animals will fre- 
uently rub bare places in these regions in their attempt to 
id themselves from the irritation. 
It is unnecessary to give any special notice regarding 
reatment, as they must be attacked on the same plan as other 
pecies. 
Even if it proves that this species does not ordinarily 
ifest the mule or donkey it would be policy not to allow 
hese animals, if infested, to associate with horses, as we have 
o assurance as yet that they can not thrive on any of the 
tembers of the equine family. 
(To be continued .) 
