288 Sarcoptic Scabies 
was considered by those authors identical with that of man. Borelli brought 
to Paris in his menagerie five terribly mangy lions, from which five assistants 
contracted severe scabies. Less severely, six horses and three grooms were 
affected, and in addition a bear and a hyaena, after holding out as long as their 
general health was good, lost condition and then quickly succumbed. 
Delafond and Bourguignon attempted to transmit the disease to rabbits 
and guinea-pigs, without much success. They conclude that this form of 
scabies is particularly severe, nearly always proving fatal in a short time, 
but that it requires a predisposition on the part of the animal attacked. 
Dromedarii. 
Tierreich : Gervais, 1841 (Ann. Sci. Nat., Ser. 2, xv. p. 9). 
Dorsal scales longer than broad, sharp-pointed, numerous; no rugose area; 
notogastral spines long, narrow, rather blunt at the end; notothoracic cones, 
twice as long as they are broad at the base. The epiandrium is not connected 
with the epimere. 
$ 360 x 330 /j.. 
<J 290 x 180/t. 
Camel, llama, giraffe, Antilope bubalis—not w . 
Canestrini (Prosp. Acarof. It., vi. PI. 62) figures he <J and the larva of this 
form. The trochantal claws appear to be very conspicuous. 
Gervais obtained his material from a mangy dromedary brought from 
Africa to the Jardin du Koi, and killed as soon as its condition was recognised. 
He deals in the paper cited with the Psoroptes of the horse, the Sarcoptes of 
man and the present form, and gives figures. He says the two Sarcoptes so 
closely resemble each other as to be easily confused without close examination. 
“ One might even suppose that it is to this similarity of organisation that it 
owes the power of passing with such facility from the animal to vhich it is 
proper to man, and of transmitting the disease from one to the other. 
It appears, therefore, that the Tierreich account is wrong as regards 
man. 
Gervais proceeds: “The form is almost the same, but the Sarcoptes of 
the dromedary is a little more elongate than that of man; the papilliform 
tubercles of the back have not quite the same disposition; in the human 
species the bilateral hair is larger and more recurved, and the inner pair of 
posterior hairs are the longer” (whereas in Dromedarii they are the shorter). 
He adds some obscure statements about the epimeres, and says that the 
dromedary Sarcoptes is larger, “which no doubt accounts for the more in¬ 
tolerable pain it inflicts when it attacks man.” 
The four “doubtful species” of the Tierreich are little more than names, 
taken from the animals on which the scabies was observed, and they may be 
rapidly dealt with. They are aucheniae, hydrochaeri, rupicaprae and wombati. 
