292 Sar Coptic Scabies 
Legros observed this parasite on rats at the Jardin des Plantes in 1865, 
and Railliet and Lucet (1893, p. 404) found it again on “white mice,” the 
black rat and the water vole. The disease is localised on the ears and the 
genitals, and apparently is never serious. 
Railliet attributes Colin’s Coati sarcopt to this species. 
Cnemidocoptes Fiirstenberg 1870. 
The Tierreich definition is: 
Male without anal cylinders; $ without copulation tubes; the mature $ without 
ambulacra; <$ with long unjointed ambulacra on all legs; anus terminal. 
Oviparous 1 (?) parasites on birds. 
It is not proposed to deal in detail with this genus. It is entirely parasitic 
on birds, and its investigation would entail a quite separate branch of research. 
Text-figure 8. Notoedres alepis, $ x 75 
(after Railliet). 
Text-figure 9. Cnemidocoptes mutans, <$ x 100 
(after Neumann). 
Cnemidocoptes agrees with Sarcoptes and Notoedres in the nature of its mouth- 
parts and in its burrowing habits, and the type species mutans Robin, 1859 
has long been known as causing scales and crusts on the domestic and game 
birds, and also on small birds in aviaries. Other species, however, have habits 
less akin to the usual sarcoptic method of life, and burrow into the feather- 
bulbs, causing deplumation. It will be sufficient to allude very briefly to the 
different forms which have been described. The general view seems to be 
that there are two species, mutans and laevis, with several varieties of the latter. 
C. mutans Robin and Lanquetin, 1859. 
Railliet (1895, p. 663) describes it thus: 
Rostrum broad, half concealed by epistome; 3 190-200/* x 120-130/*, 
body oval; no cheeks; conical legs, all with ambulacra; genital armature 
between legs 4. 
1 Fiirstenberg calls C. mutans viviparous, and Railliet figures gallinae $ with obvious larvae 
inside. 
