PROGRESS OF VETERINARY SCIENCE AND ART. 47 
the dog, the sheep, the rabbit, the guinea-pig, the monkey, 
and on man, and he is studying the effects of this direct 
contagion. The results of these experiments will be pub- 
lished in due course. — Memoir read on the \Qth of February 
before the Society of Medecine of the Department of the Seine . — 
See Gaz. Hebd. de Med. et de Chir . — Ann. de Med , Vet. 
Bruxelles , June, 1855. 
It is my intention here to refer to the history, and briefly 
to the characters, of those acari of the domestic animals 
which it is essential for the veterinarian to be conversant 
with, especially should any doubtful cases of contagion be 
brought before him. Walz, in 1810, described the sarcoptes 
ovis ; it has been figured by Youatt in his work on sheep, 
and has therefore not been introduced in our plate, to give 
place to other less generally known species. The acarus equi 
was spoken of and delineated by Kersting as far back as 
1784, and several drawings of it have since appeared; the 
chief ones being by Raspail, Hertwig,* Hering, and the most 
complete ones of all by Erasmus Wilson. The acarus of 
the ox, spoken of by Gohier, of Lyons, f was described by 
Hering in 1845, and the tw r o drawings of it in our Plate are 
from the Repertorium for the same year. The sarcoptes 
cani has, so far as we are aware, not yet been delineated. 
Hertwig has spoken of it ; J Hering has not seen it, and 
Delafond is said to have discovered it last year. Amoreux 
and Grognier cite instances of the contagion of scabies from 
dog to man, sheep, cows and camel. Viborg and Hertwig 
speak of scabies in man developed from contact with dogs 
affected with the disease. Hertwig says it agrees very much 
in form with the acarus equi ; it is, however, smaller, and has 
some broad strong hairs, somewhat feathered in appearance, 
on the sides of the body. 
The acarus of the cat was first delineated and described 
by Hering. Bourguignon, in his memoir, seems to me not 
to give Hering his due, as he is speaking of the acarus of 
* c Mag. fur die ges. Thierheilkunde, 5 von Gurlt und Hertwig ; Berlin, 
1835, 1 Heft., j). 104. 
f “The acari of cattle,” says Gohier, in 1815, “are found in greatest 
quantities on Hungarian oxen affected with scabies. Under the micro- 
scope they were not found very different from those of the horse. Their 
transference on horses, dogs, and the ass, was followed by no result, al- 
though they were observed about thirty hours after under the epidermis, 
were they had inserted themselves ; they appeared there to be broken up. 
(Seethe ‘Compte Rendu, 5 of Veterinary School of Lyons, for 1815, or 
Hering, ‘Ueber die Krazmilben der Tliiere, 5 in the Nova Acta; Breslau 
and Bohn, 1836.) 
% Loc. cit. 
