21 
whitish in color, and taper slightly to the point of attachment. The 
circular lid-like portion is large, occupying nearly all the surface of the 
free end of the egg. They are attached usually near the base of the 
hairs. 
On account of the thinness of the hair, the application of remedies, 
where necessary, is quite easy. Washes of tobacco water or dilute car- 
bolic acid, and the application of kerosene in lard, or kerosene emulsion 
by means of force pump, sulphur, ointment, etc., are recommended. 
The application of fine dust may be provided for naturally by allowing 
the hogs a chauce to roll in a roadway or any place well supplied with 
fine dust. Where this is impracticable the dust, ashes, or powdered 
charcoal may be applied directly to the neck and back of the infested 
animal. The species is not known to attack any other of the domestic 
animals, and hence no precautionary measures in this direction are 
necessary. 
THE SUCKING HORSE LOUSE. 
(Haematopinus asini Linn. — macrocephalus Burm.) 
^Notwithstanding the probable frequent occurrence of this species we 
have as yet failed to meet with examples. The biting lice from horses 
have been secured in great numbers, but we have searched in vain for 
this one. 
It is figured by Redi (Exp., PI. xxn, Fig. 1) and was described by Lin- 
naeus under the name of Pediculus asini, presumably his specimens 
being taken from the ass. Later Burmeister described specimens from 
the horse under the name of Pediculus macrocephalus. Denny retains 
the name given by Linnaeus and states that it is common upon the ass, 
and that he also had specimens from the horse, from which circumstance 
he suspected Burmeister's macrocephalus to be the same. Giebel and 
Piaget both follow the name of Burmeister, and Piaget separates as a 
variety the form occurring on the ass, and gives it the name of colorata. 
It seems hardly probable that it occurs in this /\ 
country in sufficient numbers to cause much trouble Jf \ 
on horses. Possibly examination of mules, asses, or £ ijF* 
donkeys would show greater abundance from the fact ^ju~. ~v^ .- 
that horses in general are more carefully groomed Jn**W jr>^ 
than their somewhat despised relatives. The size is '^s25* 
about the same as that of the ox-louse, but it diffei s r 4^f"' * " ^%V 
very decidedly in the form of the head, which is long, *• / f ^ ^ ;^ V ^ 
slender, and the sides of the head nearly parallel, as f <x) '. v ^.j^T 
shown in the figure (Fig. 9), taken from Comstock's 
Introduction to Entomology. A^t-^^/0 
Careful grooming may be looked upon as at least *S*^ 
n ii ., i „ , ,, . . Fig. 9. Hctinatopinus 
favorable to the reduction of numbers m this species. Mini. (Fran 
In case they become too numerous the application of a little kero- 
sene to the card or curry comb used in grooming the animals will be 
