LAGOMYS PRINCEPS.--RICHARDSON.
                              [Ochotona princeps]

                               LITTLE-CHIEF HARE.
                                     [Pika]

                             PLATE LXXXIII.--MALES.


     L. Ecaudatus, fuscus, latere pallidior, subtus griseus, capite brevi;
auriculis rotundatis.

                               CHARACTERS.

     Tailless ; color blackish brown, beneath gray; head short and thick; ears
rounded.


                                   SYNONYMES.

     LEPUS (LAGOMYS PRINCEPS).  Rich. Fauna B. Am. p. 227.
     LEPUS (LAGOMYS PRINCEPS).  Fischer's Mamalium. p. 503.


                                  DESCRIPTION.

     "On comparing the skull of this animal with that of a true Hare, there
appears a larger cavity in proportion to its size, for the reception of the
brain.  The breadth of the skull, too, behind, is increased by very large and
spongy processes.  The bone anterior to the orbit is not cribriform as in the
Hares, although it is thin, and there is no depression of the frontal bone
between the orbits.
     The upper anterior incisors are marked with a deep furrow near their
anterior margins, and have cutting edges which present conjointly three well
marked points, the middle one of which is common to both teeth, and is shorter
than the exterior one.  These incisiors are much thinner than the incisors of
the Hare, and are scooped out like a gouge behind.  The small round posterior or
accessary upper incisors, have flat summits.  The lower incisors are thinner
than those of the Hares, and are chamfered away toward their summits, more in
the form of a gouge than like the chisel-shaped-edge of the incisors of a Hare.
     Grinders.--The upper grinders are not very dissimilar to those of the Hare,
on the crowns, but the transverse plates of enamel are more distinct.  They
differ in each tooth having a very deep furrow on its inner side, which
separates the folds of enamel.  This furrow is nearly obsolete in the Hares,
whilst in the lagomys it is as conspicuous as the separation betwixt the teeth.
The small posterior grinder which exists in the upper jaw of the adult Hare is
entirely wanting in the different specimens of the Little-Chief Hare which I
have examined.  The lower grinders, from the depths of their lateral grooves,
have at first sight a greater resemblance to the grinders of some animal
belonging to the genus Arvicola than those of a Hare; their crowns exhibit a
single series of acute-triangles with hollow areas.  The first grinder has three
not very deep grooves on a side, and is not so unlike the corresponding tooth of
a Hare as those which succeed it.  The second, third, and fourth, have each a
groove in both sides so deep as nearly to divide the tooth, and each of the
crowns exhibits two triangular folds of enamel.  The posterior grinder forms
only one triangle."--(RICHARDSON).
     In size this species is a little smaller than the alpine pika of Siberia.
The body is thick; the head broad and short, and the forehead arched.  The ears
are ovate, and do not appear to have any incurvations on their inner margins.
The eyes are small, resembling those of the arvicolae; there is a marked
prominent tubercle at the root of each claw.


                                    COLOUR.

     The Little-Chief Hare is, on the upper surface dark brown, varied with
irregular bands of brownish-black running from the sides across the back.  There
are slight variations in different specimens, some having these blackish
markings more distinct than others.  The fur is, for three-fourths of its
length, of a grayish-black colour, then partly yellowish-brown and white on the
sides of the head and fore shoulders this yellowish-brown colour prevails more
than in other parts.  The ears are bordered with white; the whole under surface
is yellowish-gray, and the small protuberance, which represents the tail, light
coloured.


                                 DIMENSIONS.

                                                            Inches.

     Length of head and body.  .  .  .  .  .  .  .  .  .  .  6 1/2
     Length from nose to eye.  .  .  .  .  .  .  .  .  .  .    3/4
     Breadth of ear.  .  .  .  .  .  .  .  .  .  .  .  .  .    3/4
     Fur on the back  .  .  .  .  .  .  .  .  .  .  .  .  .    3/4
     Length of head.  .  .  .  .  .  .  .  .  .  .  .  .  .  2 1/4
     Height of ear .  .  .  .  .  .  .  .  .  .  .  .  .  .  1
     Length of heel   .  .  .  .  .  .  .  .  .  .  .  .  .  1 1/8


                                    HABITS.

     Little is known with regard to the habits of this animal.
The following extract is made from the Fauna Boreali Americana:
     "Mr. DRUMMOND informs me, that the Little-Chief Hare frequents heaps of
loose stones, through the interstices of which it makes its way with great
facility.  It is often seen at sunset, mounted on a stone, and calling to its
mate by a peculiar shrill whistle.  On the approach of man, it utters a feeble
cry, like the squeak of a rabbit when hurt, and instantly disappears, to
reappear in a minute or two, at the distance of twenty or thirty yards, if the
object of its apprehension remains stationary.  On the least movement of the
intruder, it instantly conceals itself again, repeating its cry of fear; which,
when there are several of the animals in the neighbourhood, is passed from one
to the other.  Mr. DRUMMOND describes their cry as very deceptive, and as
appearing to come from an animal at a great distance, whilst in fact the little
creature is close at hand; and if seated on a grey limestone rock, is so
similar, that it can scarcely be discovered.  These animals feed on vegetables.
Mr. DRUMMOND never found their burrows, and he thinks they do not make any, but
that they construct their nests among the stones.  He does not know whether they
store up hay for winter or not, but is certain, that they "do not come abroad
during that season."
     To the above account, it affords us pleasure to annex the extract of a
letter, which we received from Mr. NUTTALL on the same subject.
     Of this curious species of Lepus, (L. princeps of RICHARDSON), we were not
fortunate enough to obtain any good specimens.  I found its range to be in that
latitude (42 degrees) almost entirely alpine.  I first discovered it by its
peculiar cry, far up the mountain of the dividing ridge between the waters of
the Columbia and Colorado, and the Missouri, hiding amongst loose piles of
rocks, such as you generally see beneath broken cliffs.  From this retreat I
heard a slender, but very distinct bleat, so like that of a young kid or goat,
that I at first concluded it to be such a call; but in vain trying to discover
any large animal around me, at length I may almost literally say, the mountain
brought forth nothing much larger than a mouse, as I discovered that this little
animal was the real author of this unexpected note."


                           GEOGRAPHICAL DISTRIBUTION.

     Dr. RICHARDSON states, that this animal inhabits the Rocky Mountains from
latitude 52 degrees to 60 degrees  The specimen of Mr. TOWNSEND was procured in
latitude 42 degrees, and therefore within the limits of the United States.


                                GENERAL REMARKS.

     Until recently it was not supposed, that we had in America any species of
this genus.  We have compared it with the Pika, (Lagomys alpinus), of the
Eastern continent, described by PALLAS.  Our animal is not only of smaller size,
but differs from it in the formation of the skull and several other particulars.