DISEASES OF THE SXlN AMONG DOMESTICATED ANIMALS. 125 
2. Dermatophagus-itch^\w the external auditory passage. The 
malady runs its course with the symptoms ot an otitis externa. 
Sarcoptes-itch occurs in lions and leopards, caused by S. scabiei 
(Delafond and Bourguignon, Jolme). In the cases that have been 
observed, circumscribed spots appeared upon the breast, the abdo¬ 
men, the back, and soon spread over the entire body. The hairs 
were lost, the skin was thickened and folded, and covered with 
crusts and scales. 
Treatment of Scabies. The following antiparasitic remedies 
are used in these diseases by the veterinary surgeons: 
a. Aromatic phenol combinations. The most efficacious of 
these is creosote , and then following, in diminishing efficiency, 
carbolic acid, benzole, petroleum, naplithol, naphthalin, tar, oleum 
cornu cervi, wood naphtha. 
b. Aromatic vegetable products. Balsam of Peru, styrax, 
balsam of tolu. 
c. Alcaloidal plants. Badix veratri, tobacco, and some obso¬ 
lete vegetable drugs. 
d. Inorganic substances. Arsenic, mercurials, sulphur, dilute 
sulphuric acid (Morlin recommends this last 1:24 in horse itch). 
Of these remedies the most useful are : for sarcoptes-itch , es¬ 
pecially creosote, carbolic acid (1:10-20), sublimate (1:50-100), 
tar liniment (Pix. liquid., sapo. virid., spirit., aq., aa p. alq.), bal¬ 
sam of Peru, styrax, petroleum, ichthyol, (of doubtful efficacy). 
For dermatocoptes-itch : creosote, carbolic acid (usually the 
raw acid for sheep), decoctum tabaci, arsenic solutions (for sheep; 
very efficacious, but extremely dangerous), oleum cornu cervi. 
For the dermatopliagus-itch , carbolic acid, tar liniment, ben¬ 
zine (1:5 sapo. virid.), petroleum. 
16.—Demodex. 
Three species of demodex are found in the skin of our domes¬ 
tic animals. Demodex folliculorum canis, demodex phylloides 
suis, demodex cati. 
The first species is extremely like the demodex folliculorum 
hominis, but is somewhat smaller (0.2-0.3 mm. long), and has a 
more squarely-shaped head. They live exclusively in the hair folli¬ 
cles and the sebaceous glands of the dog, in which they may be 
