38 VETERINARY PARASITOLOGY 
The various lice found on each animal are enumerated 
below : 
Hematopinus macrocephalus. 
Horse { Trichodectes pilosus. 
Trichodectes pubescens. 
Hematopinus eurysternus. 
[ Hamatopinus vituli. 
Hematopinus tenuirostris. 
Trichodectes scalaris. 
Sheep { Hematopinus pedalis. 
Trichodectes sphzrocephalus. 
Ox 
Pig .. Hematopinus urius. 
f{ Hematopinus piliferus. 
Dog *\ Trichodectes latus. 
Cat ..  Trichodectes subrostratus. 
Symptoms.—These vary a good deal, in accordance 
with the variety of louse present. The Hematopinus 
forms suck blood, and 
hence cause more 
irritation than those 
which live on desqua- 
mated epidermis and 
secretions. The 
usual signs are emacia- 
tion, irritation, and 
"4 rubbing, scurfiness 
eng of the skin, with the 
a S hair erected, and 
oa AN sometimes crusts or 
(Meare K blood from rubbing. 
ALLE Usually the lice them- 
— rl Mh 
WED 
~ 
Tae selves or their ‘‘ nits ”’ 
can be found. They 
are more active in 
summer than in 
winter, and may 
Fic. 8.—TRICHODECTES SCALARIS. remain on one animal 
Greatly enlarged. a very long time. 
