C. Warburton 
283 
Sarcoptic mange of the dog is alleged by different writers to be not un¬ 
common, but investigators have generally had a difficulty in finding it. It 
usually begins on the head, muzzle, round the eyes and on the ears, but may 
appear on any part of the body (Traite pratique, p. 184 et seq.). 
In any new investigation this form must be considered in connection with 
that obtained from the pig which is next discussed. 
According to Neumann (1905, p. 183) the dog is also subject to the form 
lupi. 
Besides a Demodicic mange, and scabies due to the Sarcoptes above 
mentioned, a Chorioptic mange may be found on the dog. 
Suis. 
Tierreich : Gerlach, 1857 (squamiferus Fiirst. in part). 
Dorsal scales longer than broad, pointed; an anterior rugose area; motogastral 
spines long, slender, pointed; epimere of legs strongly curved outward; epiandrium 
reaches the epimere; body nearly globular. 
$ 350-500/z x 290-390 p. 
250-350^ x 190-300 p. 
Sus domesticus. Transmissible to man. Germany, France, Italy. 
Gerlach (1857) says that Gurlt had found it many years previously on wild 
boars, and since then Hertwig and Gerlach had recorded it from wild swine. 
Gerlach’s measurements of the $ (reduced from fractions of an inch to microns) 
are 380 x 270 p (Megnin gives the measurements $ 500 x 360/x, $ 320 x 290 p, 
and Neumann gives $ 400-500/x x 320-390^., A 250-350/x x 190-300/x). 
Gerlach describes it as very like that of man, and that of the horse, between 
the two in size, and conspicuously broader in front and narrower behind, 
even discounting the fact that the abdominal width varies according to the 
contained eggs. He, however, gives the d two genital “cylinders” (Gerlach, 
PL III, fig. 16). 
Delafond, in 1857, found on the domestic pig a Sarcoptes which he con¬ 
sidered identical with that of man, but Megnin, who has examined Delafond’s 
microscopic preparations of it, says it is Gerlach’s suis (Megnin, Ac. parasites, 
p. 140). Fiirstenberg considers Gerlach’s suis and canis identical, and re¬ 
describes them as squamiferus (see canis). 
Megnin thought the pig had two Sarcoptes —a large form on the body and 
a small form in the ears. The latter, whose existence has been disputed, is 
next dealt with under Canestrini’s name parvulus. The ordinary pig sarcopt 
first occurs on the head—chiefly the ears and round the eyes; then the withers 
croup, and inner surface of the thighs. Later, the whole body. No galleries 
are observed, but when advanced there is abundance of crusts. 
It is transmissible to man and to the dog, but soon dies out. This is the 
largest known Sarcoptes. 
