DESCRIPTIONS OF FOUR NEW TREESHREWS.

Vol.

XXIV,

_pp. 167-170 June 16, 1911

PROCEEDINGS

OFTHE

BIOLOGICAL SOCIETY OF WASHINGTON

DESCRIPTIONS OF FOUR NEW TREESHREWS.

BY MARCUS WARD LYON,

^JR.

[By permission^oftheSecretary oftheSmithsonian Institution.]

Daring

^his recent Zoological explorations ^of the

Malayan Archipelago, Dr. W.

L.

Abbott

collected,

among ^numerous

other

mammals,

representatives ^of four species ^of treeshrews

which have not been

_previously described.

They may

^be

known _by

the following descriptions.

Tupaia

^raviana sp. nov.

Type.—

^{Skin andskull, old}adult male, Cat.No. _104,355, U. S. N. M., Pnlo Rawi,

Butang

Islands, offwest coast

Malay

Peninsula, Dec.18, 1899, Dr.

W.

L.Abbott. _Grig.No. 172.

Diagnostic characters.

—

Related to T. belangeri of the neighboring mainland and T. lacernata of Pulos

Langkawi and

Terutau, but ^skull generally wider,

and

rostrum _especially thicker

and

wider, interorbital region wider, zygomata

more

_spreading; skin rather intermediate betweenthe two, but

more

likethat of T. belangeri.

Color.

—

_{Type: Upperparts}of head, neck, body,

and

outer side of legs a grizzle of a color between buff and olive-buff,

and

blackish, the two colors about _equally mixed, and the huffy ^color inclining toward ochraceous buff in the region ^of the thighs; underpartsgenerally huffy or an extremelypale gallstone yellow; ^{tail a} hue _{grizzle of} cream color

and

blackish, the ^latter predominating above

and

both about _equally prominent below except ⁱⁿ themiddle line where the lighter color^is in excess; shoulderstripe not conspicuous, ^dull creamcolor.

Skull.

—

_{In general} like that of T. belangeri and T. lacernata,but the skullisgenerally wider, with thicker^anilwiderrostrum

and more

_spread- ingzygomata. ^Thisshows

more

differences from therelatedforms than does the skin.

Measurement*.

—

_Type, and Cat. No. _123,984, V. S. N. M., Tupaia lacernata, an old adult male from Pulo Terutau:

Head and

_body,

184, ISO; tail, 165, 145; hind foot (dry), 40, 44; condylobasal length ^of skull, 46.5, 46; zygomatic width, 25.5, 24.5; width of braincase above

29—Proc.Biol. Soc.Wash., Vol.XXIV,^1911. (167)

168 Lyon —

Descriptions of

Four New

Treeshrcws.

zygomata, 19.19; maxillary toothrow, alveoli, 17.5,18; widthof rostrum back of incisors, 7, 6.5.

Specimens examined.

—

Two. _{the type}andCat.Xo. _104,354,U.S.X.M., from Pulo Adang,

Butang

^Islands.

Tupaia

pemangilis sp. nov.

Type.—

^Skin

and

_skull, adult female, Cat. No. _112,499, U. S. N. M., Pulo Pemangil, ^{east coast}

Malay

Peninsula,

June

_{12, 1901,} Dr.

W.

L.

Abbott, Orig. No. 1064.

Diagnosticcharacters.

— A member

oitheferrugineagroupclosely"related to T. sordida from Tioman, ^but slightly duller in color, with slightly grayer ^feet,

and

with anterior portion ^of underparts

more

_buffy,

much

like that of T. pulonis from PuloAor.; skull likethat of sordida, but slightly narrower,

and

with

m

³rathersmaller.

Cotor.

—

_Type:

_Upper

_{parts a grizzle} of dull

tawny

^ochraceous

and

blackish, brighteston posterior parts of body,

and

lightening anteriorly on neck and head to a_{grizzle of} raw sienna (orgallstoneyellow)

and

blackish; outerside of forelegs like top ^of neck; ^{outerside of} hindlegs, like lower hack; shoulder stripe moderatelyconspicuous, between

bun and

olive buff; throatand _{chest pale}dull buffy; innersides of legs dull buffy with darker bases of the hairs showing through; ^tail above a uniform _{grizzle of} cream color

and

_blackish, both colorsabout _equally prominent; below ^{a coarse} grizzle of dull buff

and

black, the buff^color predominating along central line; hands

and

feet a fine grizzle of the colors of the adjacent parts.

Skull

and

teeth.

—

_Very similar to those of Tupaia, sordida from the nearby Pulo Tioman, ^butskull slenderer,

and

withto³rather_smaller,

and

with _slightly smallerbullae.

Measurements.

— _{Type and}

_{the type}of Tupaia^sordida.Cat. Xo._101,747, U. S. X. M.:

Head

and _body, 185, 171; tail, 150, 165; hindfoot (dry), 40, 41 ; condylobasal length of skull, 45, 46; zygomatic width, 23,25.5;

widthof braincase aboveroots of zygomata, 19, 20; maxillary toothrow, alveoli, 17.5, ^18.5.

Specimens ^examined.

—

_One,the_type.

Remarks.

—

_{Tupaiapemangilis}isonlya slightly differentiatedform,

and

wereitnot forits insular isolation could not he considered

more

thana subspecies. ^{It is}mostclosely related to T. sordida of Pulo

Tioman and

isnot_distantly removed from ^T. pulonis^ofPulo Aor.

The

threeislands Aor,Tioman, and Pemangil ^arethus inhabited by Tupaias^of the ferru- gineagroup differing slightly from each other

and

as a whole from ^the mainland form.

Tupaia natunae

sp. nov.

Type.

—

Skin

and

skull of rather old adult female, Cat. Xo._104,714, U.S. X. M., ^collected on Bunguran,

Xatuna

Islands,June _{27, 1900,} by Dr.

W.

L. Abbott, Orig. No. 514,

Lyon —

Descriptions of

Four New

Treeshrews.

1G9

Diagnosticcharacters.

—

Relatedto Tupaiasplendidula ^of Borneo from which^it differs in agenerallybrighterand

more

reddish colorationofthe upperpartSj sides, legs and tail, and

more

inflated braincase.

Color.

—

Type: General ^{color effect of} upperparts^of neck

and

_body, in fresh pelage, most like Ridgway's burntsienna, but rather brighter, this color being produced by ^a wide band on most of the hairs, of a bright ferruginous burnt sienna mixture, with blackish basesand aconsiderable

number

^<>f long blackish ^hairs; on rump, where an ^oldpelage persists, thegeneral ^colordarker

and

duller; sides of body and ^outerside of legs similarto upperparts, but showing ^atendencyto grizzling; top^of nosea grizzle^of raw sienna and blackish gradually blending ⁱⁿ on _top of head with colorof upperparts; cheeks and sidesof neck an indistinct grizzle of blackishand buff olive; shoulder-stripe buffy ^to ochraceous _buff; an indistinct huffyochraceous eyering; underpartsgenerallyacolorbetween buffand olive-buff; inner side of legs essentially like sides of body, but rather _lighter; tail above _generally like back, but ^{in dull}

worn

_pelage;

undersideoftail and bases of tailhairs generally,

tawny

ochraceous, with the outerand terminalmargins^oftaildark tawny.

A

_paratype,abarely adult female,^is generally^likethe typeⁱⁿ color, but shows distinct griz- zling on sides of body, on neck, shoulders

and

_thighs,

and

indistinct grizzlingon_{upperpartsgenerally.}

Skull

and

teeth.

—

_Theseareof the

same

general formasthey are^{in T.}

splendidula, the skull averages longer, however, has a

more

inflated braincase,and the teeth are distinctly larger.

Measurements.

— _Type

_and those of Cat. No. 151,883, T. splendidula, from

Klumpang

Bay, southeastern Borneo; head and _{body, 184, 189;}

tail, 140, 130; hindfoot, 40, 41; condylobasal length of skull, 4(i, 44;

zygomatic width, 25, 25; width of braincase above roots of zygomata,

19, 17.5; maxillary toothrow (alveoli), 18.5, ^17.

Specimens examined.

—

_Two, the _type,

and

skin

and

skull, Cat. No.

104,715,a

young

adult female, ^also from

Bunguran

^Island.

Tupaia

sincepis sp.

now

Type.—

^{Skin and skull of} adult male, Cat, No. _123,105, U.S. N. M., collected on Pulo _Singkep, Rhio-LingaArchipelago, August 8, 1903, by Dr.

W.

L. Abbott, Orig. No. 27:12.

Diagnosticcharacters.

— A

slightly differentiatedformof Tupaia malac- cana with a

more

rufescent color on _{the back,}

and

with adarker

and more

blackish tail.

Color.

—

Type: Upperparts^of head, neck, and _body,

and

outer side of legs, a line grizzle of buff and _blackish, the buff color being gradually replaced by

tawny

^{ochraceousonthe}lower back, rump,

and

baseof_tail;

underparts varying from _pale buff, or cream color anteriorly ^to dirty whitish posteriorly; inner side of legs similar to adjacent portions ^of underparts; tail,above,anindistinct grizzle ofochraceous buffand _black, thelattercolorin excess _especiallyalongmargin

and

_{tip of} tail; middle portion^of undersideof tailcream buff_finely lined with blackish, outer

170 Lyon —

Descriptions of

Four New

Treeshrews.

portion

and

tip generally blackish with a _slight admixture of buff or ochraceous _buff; upper surfaces of feet ochraceous buff with the dark bases of the hairs showing through^; eye ring, fairly well defined buffy^; shoulderstripe, well marked, ^whitish.

The

rest of the series are essen- tiallylikethe_type, but threeof

them

are

more tawny

^{about the}

rump

andbase oftail.

Skull

and

teeth.

—

These

show

no _special characters by which Tupaia sincepis can be distinguishedfrom T. malaccana.

Specimens examined.

—

_{Six,the type}

and

fiveothers, ^allfromthe island ofSingkep.

Measurements.

— Head

and _{body, 140;} tail, 165; hind_{foot,37; condylo-} basal length of skull. 36.5; zygomatic width, 20.5; width of braincase aboveroots ofzygomata, 16.5, maxillary toothrow (alveoli), ^13.

Remarks.

—

_{Tupaia sincepsis} is very closely related to T. malaccana from the

Malay

^Peninsula. Specimens from ^{the islands of} Linga

and

Sumatra

_appear to be ratherintermediate between the twoforms, those from

Sumatra

_being

more

likethe Peninsular animal.

The

_{Linga speci-}

mens

resemble T. sincepsis in having ^a

tawny

^{color on} the back, but lack thedarker tail.