198 
HERBERT OSBORN. 
keepers of dogs, it was not technically described until about 
the year 1838. 
It does not appear to have been a very numerous or injuri¬ 
ous parasite, apparently much less so Than the Trichodectek 
latus infesting the same animal, and less annoying than either 
ticks or fleas. Denny says (Monog. Anop. Brit., p. 29), “ I 
have found it upon dogs two or three times, but it is by no 
means of common occurrence.” We have examined many! 
dogs in quest of it, but only a single specimen has so far been 
our reward. Denny says (loc. cit.), “ I also received specimens 
from the ferret.” It can hardly be inferred, however, that 
this animal is a normal host for the species, as such an instance 
might occur entirely from accident, the louse having been 
transferred from some dog to a ferret associated with it. 
This species is somewhat smaller than the lice infesting 
most of the larger mammals, the full-grown individuals being 
nearly one-tenth of an inch long. It is described generally 7 as 
of a light-red or ashy flesh color, but evidently varies as the 
other species, according to condition of the body as well as 
age of specimens. In preserved specimens these colors be¬ 
come lighter, assuming a yellowish hue, the abdomen, except 
where darkened by 7 the intestine and its contents, appearing a 
shade lighter than the front part of the body. The abdomen 
is thickly covered with fine hairs and minute warty eminences, 
these latter when magnified about 300 diameters appearing 
like the scales of a lizard or fish. 
Specimens from different breeds of dogs do not appear to 
have been noticed as different, though a form described as 
H. bicolor by Lucas may 7 perhaps be found to present race; 
characteristics. 
The Short-Nosed Ox-Louse. (Plate I, Fig. 1.) I 
Hceniatopinus curysternus, Nitzsch. 
Phis is the species that has probably been familiar from 
early time as the louse infesting cattle, though since this 
species and the following one have been generally confused, 
it is impossible to say which has been most common. It was! 
first accurately 7 described by Nitzsch under the name of 
