LICE AFFECTING- DOMESTIC ANIMALS. 
. 271 
\il us cams, the first certain reference to it appears to have 
een the description by Nitzsch, in 1818. Since that time it 
as been referred to by nearly all writers on the common par- 
dtes of animals, but so far as we know there has been no- 
>ecial description of the different stages, and we must as- 
lme that there is no important departure from the habits of 
>ecies that are more thoroughly known. 
It is a little moie than a millimetre in length and has much 
ie appearance of the species occurring on other domestic 
limals, but it is distinguished particularly by the form of the 
■iad, which is quite pointed, and the under part of the front 
the head is hollowed out in a furrow about the size of a 
lir. This insect will often be found adhering by the mouth 
irts with a hair so closely held in this grove that it is some- 
hat difficult to tell where the hair begins as separate from 
ie insect. 
, There is no record that we have seen which indicates its 
! esence on any animal other than the domestic cat, and, 
idgmg by our own observation, it is only occasionally that 
jts become infested with it. When they do, the usual 
Imedies may be administered, especially a washing with 
■rosene emulsion, after which the animal should be allowed 
dry in a warm place, as the fur is so fine that they dry 
•wly. 
| Chicken Lice. 
I There are no less than six different kinds of lice that occur 
r mally on the common barn-yard fowl, and at least one 
ier species occurring on other birds that has been recorded 
taken on this much parasitized species. 
One of these, the Gonicotes abdominalis , shown in Fig. y y 
ite II, is said to be very common, but in this locality it has 
: been found so abundant as the following : 
It is a large, conspicuous species, about 3 millimetres in 
gth, quite broad, the head nearly circular in front and con- 
cted behind, the thorax small, the abdomen widening to 
r the end and terminating abruptly. The head, thorax, 
f legs are yellowish, with dark margins and spots ; the ab- 
