Two new Malayan Mouse deer

Vol. XV, ^pp.173-175

August

6, 1902

PROCEEDINGS

OFTHE

BIOLOGICAL SOCIETY OF WASHINGTON

TWO NEW MALAYAN MOUSE DEER.

BY GERRIT

S.

MILLER,

^Jr.

The

^{series of}

Mouse Deer

ⁱⁿ the

United

States

National

Museum

contains

two

hitherto

undescribed forms, one from

the

Malay

Peninsula, the other

from Borneo. They may ^{be named} and

defined as follows:

Tragulus ravus

sp. nov.

Type.

— _Immaluref

female _(skin and _skull) No.83.50G United States National

Museum.

^Collected inTrong,

Lower

Siam,

September

^G, 189G,

by

^Dr.

W.

L.Abbott.

Characters.

— _{A member}

of the hancMlX group resembling Tragulus pallidus from Pulo_Laut,

North Natuna

_Islands, but _larger, the general

colorlesspallid, legs

more

_red,

and

_{dark napestripe}lesswell defined.

Color.

— _{Back and}

sidesochraceousbuff heavilyclouded

by

^{the black-}

ish hairtips,sothatthe general ^{effect is} a yellowish gray, darker on back

and

shoulders,

where

black is distinctly in excess, noticeably lighteronsides. Legs,except^{forthe usual}white markings,ochraceous,

*Published here

by

permission ^of the Secretary ^of the Smithsonian Institution.

fUteruscontained afull

grown

^fetus. Milk premolars ^still in place, though very

much

worn.

:}:For use of this

name

see Stone and Rehn, ^Proc. Acad. Nat. Sci.

Philadelphia, 1902, pp. 128-131.

June

4. 1902.

33—Biol,. Soc. Wash. Vol. XV,1902. (173)

174

JAVA/-

—

T,i'o Xiii-

Muhiijnn

M<>-iis( Deer.

sli^'htlypalerthanthat of Ridgway.

A

_{narrow, very}indistinct line of thiscolordivides colorof sidesfrom the pure white ^of underparts. In axillaryregion ^{this line}widenstocoversidesof chest and send back an irregularand variablestreak alongmiddle _{of belly.}

Neck

ochraceous, less bright than that _{of legs}

and

mucli _sprinkledwithblack. Nape-

band

ill-defined, black, considerably

mixed

with ochraceous. Throat markings normal, the dark bands like sides of neck and well defined collar slightly paler.

Head

andfacelikesides of neck, but ochraceous lessbright

and

blackhairs

more

numerous. Tail white beneath andat tip, dullochraceousabove.

Skull.

— _The

skullshows nocharacters worthy^{of note,} except^{that in} size itdistinctly exceedsthatof Truyuluxpallidas.

Measurements.

—

External

measurements

of the type: ^totallength, 535;

headand_body, 470; tailvertebrae, 05; hind_{foot, 120;} hindfoot without hoofs, 108. Weight, ^1.9 kg.

An

adult male from the type locality:

totallength. 520; head

and

_body, 445; ^tail vertebrae, 75; hind foot, 112;

hindfootwithout hoofs, 102. Skull of type: greatest length, ^94; basal length, 8(5; basilarlength, 82; occipito-nasal length, ^89. Skull of adult male: greatest length, 93; basal length, 85: basilar length, 80; occi- pito-nasal length, ^86.

Specimens^e.vamined.

—

_{Eight, all fromthe}

typelocality.

Remark!*.

—

This_speciesisreadily distinguishable from _Trarjiiluskan- chil by^itspallid coloration, and from T. 'pallidus by^itsgreater^size.

Tragulus borneanus

sp. nov.

Tyj^e.

—KawW,

male(skull only)No. 34,924UnitedStatesNational

Mu-

seum. Collected on the

Suanlamba

River, British North _Borneo, by

C

^F.

^Adams.

Characters.

—

In general similar ^to I'rayulus

nupa

from Sumatra, but smaller

and

darker; toothrow_longerthaninthe

Sumatran

animal.

Color.

— _Through

preparation by

means

of an acid preservative ^fluid the skins

examined

have beenaltered in color by ^the removal of most of the red and _yellowtints.

The

color pattern, however, remains un- changed. Underparts^{as in} Tragulus napu, ^the middle _{of belly}with a

dusky wash

(probably rusty before action^{of acid)}onti^s of hairs.

Up-

perparts with _decidedly

more

black than in T. napu,^the crown and napestripenearly^clearblack, and theblackclouding^oftheback

much more

noticeable, ^{in this}respect suggesting T. pretiosus.

Skull

and

teeth.

— _The

_skullisdistinctlysmallerthanthatof Tragulus napu,^so

much

sothat those of

immature

individuals suggest those ^of T. kanchil. In generalformthereappear^to be no _tangibledifferences.

The

ascendingportion^of thepremaxillary^isbroaderthaninthe

Suma-

tran animal, andthe horizontal portion ^less produced forward. Teeth actually^aswell as relativelylargerthanin 7\ vajru, the difference _par- ticularlynoticeableinthe lower premolars.

Miller

—

To'o ^ev:!

Malayan Mouse ^{Deer. 175}

Measurements.

—

External measvirements* of adxilt female from Sapa- gaya River, British

North

Borneo _{(No. 19,213} U. S. Nat. Mus.): ^total length, 600;

head and

_body, 520; tail vertebrte, 80; hind foot, 132_(118).

Cranial

measurements

of type: greatest length, 107 _(115)f; basal length, 102 _(108); basilar length, ^96.5 (100); occipito-nasal length, 101 (104); zygomatic breadth, 49 (49); least interorbital breadth, 29 _(32);

mandible 84 (90); maxillary toothrow, 42 (37.4); mandibulartoothrow, 48_(42.4).

Specimens examined.

—

Seven skins and skulls, ^all from British

North

Borneo.

Remarks.

— _That

_theBornean

_Napu

is distinct from that of

Sumatra might

x-eadilyhave been_suspected in view of the

known

_tendency of thegroup^tovary. Actual comparison

shows

thattheanimalsare read- ilyseparable.

*From

well

made

skin.

fMeasurements

ⁱⁿ parenthesis are those ^of an adult

male

_Tragulus

napu

from Tapanuli Bay, northwestern Sumatra.