C. Warburton 
285 
Neumann’s paper has been unobtainable, and he does not describe this 
Sarcoptes in his Parasites. Railliet (1895, p. 656) says: the dorsal scales of 
the ? are not very sharp but rather strongly chitinised, at least in front and 
at the sides. A posterior “clairiere.” Epiandrium rather loosely connected 
with epimere. $ 340-400/x x 260-300/x, 210-228/* x 155-178/*. Oviparous 
«■ 
or viviparous. 
Its habits seem to be precisely like those of furonis in the ferret. It 
affects in turn the nose, lips, chin, the base of the claws, and the plantar 
surface of the feet, sometimes extending to other parts, and causing greyish 
crusts. The disease is very contagious among rabbits and often ends fatally 
in a few weeks. Neumann did not succeed in communicating it to dog, sheep, ox, 
pig or horse, but Railliet succeeded in the case of the capybara and the ferret. 
The question naturally arises as to whether this form is distinct from 
furonis . The chief differences seem to be its larger size, and the connection 
between the epiandrium and the epimeres of legs 3 and 4. The rugose area 
might well escape observation. 
Canestrini calls this form S. praecox, considering cuniculi preoccupied for 
Notoedres (vide infra). He gives ( Prosp. Acarof. It., vi. PI. 69) a figure of the $ 
showing the trochantal claws on leg 1—alleged by Megnin to be always 
present in Sarcoptes. 
Ovis. 
Tierreich: Megnin, 1880. 
Dorsal scales not numerous; an anterior and a posterior rugose area (or clear 
space) not very extensive (ausgedehnt). Epiandrium feebly connected with 
epimere. 
$ 314 x 300/*. 
$ 220 x 160/*. 
Ovis aries. France, Italy. 
Delafond (1858) was the first to find this parasite, which, of course, must 
not be confounded with the cause of “sheep scab” (which is a Psoroptes), 
or with the Chorioptes which also affects this animal. It causes “ black muzzle ” 
or “face mange,” and is much less common than the Psoroptes. 
It only attacks parts free from wool, first appearing on the upper lip and 
round the nostrils, and later invading the face, forehead, cheeks and eyelids, 
and sometimes the intermaxillary space. When of long standing it may 
appear between the fore-legs, on the belly, and round the joints. 
Delafond’s subjects were Neapolitan sheep brought to Paris. Both the 
Psoroptes and the Sarcoptes were present, and a pupil (Polvent) at the Alfort 
Veterinary College who treated them became badly infected by the Sarcoptes , 
which Delafond considered to be exactly like that of man. The pupil, though 
in a terrible condition, persisted for 49 days without treatment, but was then 
so ill that cure was undertaken. This occupied a fortnight. 
The Tierreich measurements are those given by Megnin. 
