Descriptions of six new mammals from the Malay Archipelago

Vol.

XXIV,

pp. 25-28 February 24, 1911

PROCEEDINGS

OFTHE

BIOLOGICAL SOCIETY OF WASHINGTON

DESCRIPTIONS OF SIX NEW MAMMALS FROM THE MALAY ARCHIPELAGO.

BY GERRIT

^S.

_MILLER,

^JR.

[By permissionofthe Secretary of theSmithsonianInstitution.]

The

_large collection of

Malayan mammals

ⁱⁿ the

United

States

National Museum

includes representatives ^of the follow- ing ^six forms,

none

of

which _appears

to

have been

_previously described.

Pipistrellus curtatus _sp. nov.

Type.—

^{Adultfemale(inalcohol) No.} 141,019, U.S.National

Museum.

Collected on

Engano

Island, Sumatra,

December

_{1, P)04, by} Dr.

W.

L.

Abbott. Original number, ^3785.

Diagnosis.

—

_Resemblingthe

Javan

Pipistrellusimbricatus,butearlarger, muzzleshorter

and crown

area^ofanteriorlowerpremolar

much

reduced.

Externalcharacters.—Size

and

_generalform essentially as inP. imbri- catus, but tailslightlylonger

and

foot lessrobust.

Membranes

withno special peculiarities,the

wing

^{inserted at baseofoutertoe. Calcar ter-} minatingindistinctly,^itsposteriorborder withaslight keel thatshows

no

tendency ^to develop^intoadistinctlobelike thatofP. imbricatus.

Ear

extending ^{a little}beyond ^nostril

when

laid forward, ^itsgeneral outline as in P. imbricatus but _antitragus better developed.

Head

shorter

and

broader than in the

Javan

species, ^its general outline

when

viewed from above_nearlycircular, with_slightlyprojecting, moderately tumidmuzzle.

Color after sixyears immersion inalcohol apparently not ^sodark as in P. imbricatus.

Skull

and

teeth.

— _The

skull isatoncedistinguishablefromthatofPipis- trellus imbricatus by^thedecided reduction of rostrum as

compared

^with braincase, a ^difference equally appreciable ⁱⁿ dorsal or _palatal view.

Palateso

much

shortened that length ⁱⁿ

median

line isonlyabout_equal towidth betweenlastmolars. Auditalbullae as inP. imbricatus. Basi- sphenoidpitsratherwell defined.

Teethas in Pipistrellusimbricatus except thatpremolars are decidedly

more

reduced; anteriorupper premolar with crownarea barely equal ^to halfthatofouter_incisor;

crown

areaofanteriorlowerpremolar slightly

7—I'koc.Biol. Soc.Wash.,Vol..XXIV,1911. (20)

26

Miller

—

_Six

New Mammals

from ^the Mala]/ Archipelago.

more

than"half that of succeeding tooth; length ^of crowns of the two lowerpremolarstogetherdecidedly^lessthanthatoffirstmolar.

Measurements.

—

_{Type: head}

and

_{body, 40; tail, :!4; tibia, 14.8; foot,}

7.2; forearm, 33.6; thumb, ^6.2; third finger, 60; ^fifth finger,45; ear from_meatus, 13.6. Skull oftype: condylobasal length, ^LI.6; zygomatic breadth, 9.0; interorbital constriction, 3.8; breadth of braincase, 7.0;

depth ^of braincase, 5.0; mandible, 8.6; maxillarytoothrowexclusive of incisors, 4.2; mandibular toothrowexclusiveof incisors, ^4.4.

Specimens examined.

— _Two,

_bothfrom Engano.

Epimys maerens

sp.

now

Type.

—

_Adultfemale_{(teeth so}

much worn

thatenamelpattern ^is1>egi^li-

ning^tobeobscured)No. _141,193, V. S. National

Museum.

Collected at

mouth

^of MojeiaRiver, Nias _Island, Sumatra,

March

_11, 1905, by ^J>r.

W.

L. Abbott. Original

number,

40<>2.

Diagnosis.

— A member

^ofthe

Epimys

^rattus group; color as inthedark E. shnalurensis of Simalur Island, Sumatra, but ^size decidedly ^less,the hindfoot not attaining a length ^of 40

mm.,

^the

maximum

condylobasal length^ofskull

among

^twelveadults, 42

mm.

Measurements.

—

_{Type: head}

and

_{body, L78;} tail, 168; hind foot, :!4;

(32). Average

and

extremesofthesix largestspecimens: head and body, 17S (170-185); tail, 159(155-168); hindfoot,34.9 (33.6-36); hind toot.

without_claws,33.1 (32-34). Skulloftype

and

_{of largestspecimen} in the series: condylobasal length, 39.8 and42.0; zygomatic breadth, ^20.2and 19.8; interorbital constriction,6.8and 6.6; breadthofbraincase,10.0and

1(').0; depth ^{of braincase at}middle, ^11.8 and 12.0; nasal, 14.2 and 15.2;

depth^ofrostrum behind incisors, 8.2

and

_{8.0; mandible,} 25.0 and_26.0;

maxillary toothrow, ^6.6

and

7.0; mandibulartoothrow, ^6.2and 7.0.

Specimens examined.

—

_Nineteen, allfrom NiasIsland.

Remarks.

— The

Nias representative^of the

Epimys

^rattus group ^shares the dark color of theotherBarussan ^local forms.

The

_upperpartshave

more

ofthe burly^castthan isusual inE. simalurensis and the_bellyisa clearer

smoky

gray, but thedifferenceis veryslight. In sizethere is a

marked

contrast witli E. simalurensis

and

E. _{lugens, in} bothof which the length^ofthehindfootusually exceeds 40 nun., andthe condylobasal length ^is usually

more

than 45

mm.

^{In both size}and color thescries is

remarkably^uniform.

Two

^Niasspecimens, however,representa light col- oredspecies essentially like

Epimys

neglectus (Nos.121,8(12 and 141,184);

this animal hasprobably been artificiallyintroduced.

Epimys ^barussanus

^sp.

now

Type.

—

Adultmale(teethmoderately worn),^skinandskull No._141,208, U.S.National

Museum.

Collectedat

mouth

^of MojeiaRiver, Nias Island, Sumatra,

March

10, 1005, by ^Dr.

W.

L. Abbott. Original number,^4010.

Diagnosis.

— A member

of the

Epimys

cremoriventer group resembling the previously

known

_species in general appearance, but ^size decidedly greater, and skull with anterior portion ^ofrostrum widened.

Millci

—

Six

New Mammals _from

the

Malay

Archipelago.

27

Color.

— _The

color does not differ essentiallyfrom that of

Epimys

^cre-

moriventer, though ^{theoehraceousofthe} hack isduller (lessyellow)and the intermingling^ofblackish hairs is

somewhat more

conspicuous. ^Tail morenoticeably blackish thanin E. cremoriventer,^itsannulations coarser and

more

evident.

Skull

and

teeth.

—

_Aside from itsconspicuously greater^size the skull of

Epimys

^{barussanus differs from that of E.} cremoriventer in a distinct broadening and deepening^of anterior portion ^ofrostrum atonce _appre- ciable on comparison ^of specimens. Contrast between width of nasals anteriorlyandposteriorly

more

evidentthaninthe smaller animal. Teeth withnopeculiarities ofform.

Measurements.

—

Type: head and body, ^1.73;tailL>4; hind_foot,34(32).

Skull oftype: condylobasallength,36.6 (33.2);*zygomaticbreadth, ^18.2 (16.4); interorbital constriction, 6.6 (6.0)'; breadth of hraincase, ^15.4 (14.S); depth ^{of hraincase at} middle, 11.0 (10.0); nasal, 14.2 (13.2);

depth ^ofrostrum behindincisors, S.O (6.8); mandible, 21.8 (20.0);

max-

illarytoothrow, 7.2 (0.0); mandibular_toothrow, 7.0 (0.0).

Specimen*^examined.

—

_Four, all fromthe

same

locality asthe_type.

Epimys mengurus

sp. nov.

Type.

—

Adult male(teethmoderately

worn

),skin

and

skull No._125,021,

r. S. National

Museum.

Collected at Bukit

Menguru,

^Billiton Island, Sumatra, August 14, 1904, by^Dr.

W.

L.Abbott. Original number,^3581.

Diagnosis.

—

_Like

_Epimys

cremoriventerbut with _relatively longer ^tail, smallerteeth and

more

slenderskull; nasalsshowing^atendency^towiden anteriorly as inE. barussanus.

Measurements.

—

_{Type: head}

and

_body, 134; tail, 182; hind _foot, 26 (25). Skull _{of type:} condylobasallength, 30.6; zygomaticbreadth,15.0;

interorbital constriction, 5.6; breadthofhraincase, 13.4; depth ^ofbrain- ease at middle._9.8; nasal, 12.2; depth ^of rostrum behind incisors, 7.0;

mandible, 17.2; maxillary toothrow,^5.8; mandibular_toothrow, 5.6.

Specimens examined.

— _The

_type,fromBilliton; alsotwo

immature

indi- vidualsfrom

Banka

_{(Nos. 124,887} and 124,889) probably referable tothe

same

form.

Epimys

^batus sp. nov.

'/'///"'•

—

Adult female (teeth moderately worn), ^skin and skull No.

121,792, U. ^S. National

Museum.

Collected on Pulo_Pinie,

Batu

_Islands, Sumatra.

March

4,1903, by^Dr.

W.

L. Abbott. Originalnumber,^2368.

Diagnosis.

— A member

of the

Epimys

aspergroup, with the large ^size and heavy ^{teeth of}E. batamanus Lyon,

and

E.

mandus

Lyon, ^{but color} verydark

and

_rich, the upperpartsessentially as inE.

mandus

but

more

strongly oehraceous, the underparts^clearyellowish ochraceous-buffwith only a slight trace ofgray ⁱⁿ region^ofchin.

Measurements.

—

Type: head and body, 133; tail, 107; hind _foot, 32 (30.4).

Two

adult females: head

and

_{body, 135}

and

14(i; tail, 105

and

•Measurementsinparenthesis are those ofmioldmaleEp imyscremoriventerwith muchwornteeth(No. _104,154,TheDindings).

28

Miller

—

Six

New Mammals _from

the

Malay

Archipelago.

105; hind_foot, 30(28.6)and^:51(29). Skulloftype: condylobasallength, 31.4; zygomaticbreadth, 16.0; interorbital constriction, 6.0; breadthof braincase,14.2; depth^{ofbraincaseat}middle, 10.0; nasal, 11.2; depth^of rostrum behind incisors, li.li; mandible, 10.0; maxillary toothrow,5.8;

mandibulartoothrow, ^5.8.

Specimens examined.

—

_Three, allfrom PuloPinie.

Ratufa bicolor

major

subsp. nov.

Type.—

^Adultfemale (skin

and

_skull) No. _155,666, V. 8. National

Mu-

seum. Collected at Tjibodas, Mt. Gede,Java, ^alt. 4,500 ft., August^15, 1909, by Win. Palmer (BryantExpedition). Original number, ^505.

Diagnosis.

—

SimilartoRatufabicolor bicolor of thelowlandsofeastern Javabutlarger.

Measurements.

—

_{Type: head}

and

_body,.">(>5; tail,435; hind_foot,87_(80).

Skulloftype ^(teeth moderately

worn

): condylobasal length, 70.4(66.0);*

zygomaticbreadth,^45.<S(43.6)^; interorbital constriction, 2S.2 (25.S); post- orbital constriction,21.2(21.8); mastoidbreadth, 33.4(32.0); nasal, ^25.S (22.0); greatest

combined

breadth_{of nasals,} l:*>.4(13.2); mandible,^47.0 (45.2); maxillarytoothrow (alveoli), 13.6 (13.8); mandibular toothrow (alveoli), 14.0 (14.2).

Specimens examined.

—

Three, all fromthe

same

locality asthe_type.

*Measurementsin parenthesis are ^{those of}anoldfemale(teethmuchworn)from Tjinmnggoe, Java,the largestⁱⁿaseries oftwelveskulls ofthelowland form.