PROCEEDINGS

PROCEEDINGS

OFTHE

BIOLOGICAL SOCIETY OF WASHINGTON

FIVE NEW MAMMALS FROM MEXICO AND ARIZONA.

BY

^{E. A.}

GOLDMAN.

The

following descriptions ^ofhitherto

unrecognized forms

^of

mammals

ⁱⁿ the collection of

the

_Biological

Survey

^are

based

in part

on material gathered by E. W. Nelson and

_myself,

mainly

ⁱⁿ

Mexico. One

of the

woodrats was included

in

a

collection of

mammals made by Charles Sheldon during a

recentvisitto

the

state of

Sonora, Mexico,

Potosflavusguerrerensis subsp. nov.

GUERRERO

KINKAJOU.

Type from near Ometepec, Guerrero, Mexico. No._74,683,

male

_adult, U. S. National

Museum

(Biological Survey Collection), collected

by

E.

W.

_Nelson,

and

E. A.

Goldman,

February15, 1895. Original

number

7464.

Generalcharacters.

—

Size

and

colorabout as inP._f. aztecus; skull ^less elongated, therostrum

and

frontalregionrelativelybroad; auditalbullae

more

fully inflated, rounded

and

bulging conspicuouslybelow basiocci- pital, instead of flattened as in all of its

known

relatives in Middle America.

Color.

—

Type: Upperparts nearclay color (Ridgway, 1912),

somewhat

suflFused with ochraceous-tawny, especiallyonneck, the top^of head

and

back darkened

by

brownish-tipped hairs; underparts, Including inner sides of limbs

and

under side of tail cinnamon-buffy, ^{this color darkest} across

abdomen and becoming

clay color along ^{thesides; outersides of} limbs

and

feet to baseof toessimilar to back, the ^toes

more

brownish.

Another _specimen, an adult male, ^is richer,

more

ochraceous-tawnyⁱⁿ color, with an _elongated dark

brown

patch

on

the

median

line of the

abdomen

; alsopresentⁱⁿ

some

_specimensofotherformsofthe group.

Skull.

—

SimilartothatofP. f. aztecus,but lesselongated, therostrum

and

frontal region relativelybroad; basioccipital narrower

and

less dis- tinctly ridgedalong

median

_line; audital bullae

more

inflated, projecting

26—Pkoc. Biol.Soc.Wash..Vol.XXVIII.1915. C133)

more

conspicuously below basioccipital^; postorbital processes stout

and

taperingas in aztecus,not_peg-likeas inP.f. cMriquensis.

Measurements.

—

_Type: Total _length, 1050; ^tail vertebrse, 536; hind foot, 110.

An

adultmaletopotype: 950; 490; ^103. Skull (type)^:Great- est length, 93.5; condylo-basal length, 89.1; zygomatic breadth, 61.9;

interorbital breadth, 22.3; breadth of rostrum, 23.7; breadth across mastoid _{processes, 46.3;} alveolar length ^of upper molariform ^tooth- row, ^21.

Remarks.

— An arm

of the general range ^of the Polos flavus group extendsnorthwardinthetropical beltalong the^Pacific coastwestofthe high mountains^oftheinterior to

Papayo

⁽near Acapulco^),Guerrero,

and

perhaps^farther. Specimens from ^thisregiondo notdifferappreciablyⁱⁿ general^size or color fromP._f.aztecusofeasternMexico, butthe cranial characters aredistinctive.

Specimens examined.

—

_Four, from localities in Guerrero as follows:

Near Ometepec

(typelocality), 3; Papayo, ^1.

Qeomys

^personatustropicalis subsp. nov.

TAMAULIPAS POCKET GOPHER.

7)/pe from Alta Mira, Tamaulipas, Mexico. No. _92,946, male _adult, U.S.National

Museum

(BiologicalSurveyCollection), collectedby^E.A.

Goldman,

April18, 1898. Original

number

12,320.

General characters.

—

Similar in color to G._p. personatus

and

G._p.

fallax;^size rather small, about as in fallax,

much

smallerthan _{in typi-} cal personatus; ^skull differing in detail from both, especially in the anteriorly spreading zygomata, slenderer posterior ends of premaxillse,

and

narrowerinterpterygoid ^fossa.

Color.

— Type (somewhat worn

pelage)^: General color of upperparts between

cinnamon and

cinnamon-buff, fading to light buff alonglower part of sides; the top ^of head

and

back thinly overlaid with

brown;

underparts white^;feetthinly clothedwithshortwhitish hairs;tailnearly naked; flesh-colored.

Skull.

—

Similarinsizetothatof G.p. fallax,

much

smaller than that of G._p.personatus;

zygomata

narrowingposteriorly,thesideslessnearly parallel,

and

ascending branches^of premaxillae narrower,

more

_tapering

posteriorly than infallax or typical personatus; interpterygoid ^fossa narrow; mastoid

and

audital bullpe shrunken in appearance

much

as in typicalpersonatus, notswollen orroundedas in fallax.

Measurements.

—

_Type: Total length, 270; ^tail vertebrse, 86; hindfoot, 33. Skull (type): Condylo-basal length, 46.9;zygomatic breadth, 30.4;

interorbitalbreadth, 6.2; lengthof nasals, 17,6; alveolar lengthofupper molar_series, 10.

Remarks.

— No

_specimensofthegenus Geomys, ^as

now

restricted, have hitherto been recorded from Mexico.

The

_discovery of a form of G.

personatusⁱⁿextreme southern Tamaulipas,therefore,materiallyextends the

known

rangeofthegroup^tothesouthward.

Specimens examined.

—

_Twelve, allfrom_{the type}locality.

Goldman —Five New Mammals from Mexico and Arizona. 135 Neotoma albigula mearnsi subsp. nov.

MEARNS WOOD

RAT.

Type from Tinajas Altas, near international boundary, southwestern Arizona. No. _202,981, male _adult, U. 8. National

Museum

(Biological Survey Collection), collected by ^{E. A.}

Goldman, November

21, 1913.

Original

number

22,^.300.

General characters.

—

_Closely allied to N. a. albigula but _paler, the ground ^{color of} upperparts light buff instead of

warm

buff or _light ochraceous-buff of Ridgway, 1912, as in that form; underparts purer white, the areasofbasally

plumbeous

^fur

more

restricted;tail lesssharply bicolor, grayer above.

Color.

— Type

(fresh pelage): Upperpartslight buff, nearly pure on cheeks, flanks

and

outersides of limbs, the top^of

head and

backrather thinly^linedor overlaidwith

an

admixtureofblack-tipped^hairs; under- parts,including lips, sides of muzzle,

and

innersides oflimbs white, the furpure white^{to roots}exceptalong^flanks

and

sides of

abdomen

where

it ispaleplumbeous basally; ears grayish,edged withwhite; ^feetwhite;

tailgrayishabove(light

and

darkhairs intermixed), whitebelow.

Skull.

—

Like that of N. a. albigula; palate concave posteriorly

and

firstupper molar with antero-internal reentrant angle shallow,^{as in} the typicalform.

Measurements.

—

_{Type: Total} length, 337; ^tail vertebr?e, 165; hind foot, 35. Average^of

two

adult topotypes: 332 (329-335); 158 (157-159)^; 32(31.5-32.5). Skull (type): Greatestlength, 43.2; zygomaticbreadth, 21.5; interorbital breadth,5.9; lengthof nasals, 16; length ^of anterior palatine foramina, 8.6; length of palatal bridge, 7.7; length ^of upper molarseries, 8.5.

Remarks.

— The

_pallid coloration of this form readily distinguishes ^it from N. a. albigula

whose

_rangeincludesmostof Arizona,

New

Mexico, easternTexas

and much

ofnorthern Mexico.

N.

a. mearnsiisprobably restricted totheextremely arid desert areaextending from nearthe type locality southward along the eastern side of the Gulf of California

—

a region largely covered with _shifting, whitish sand. Close comparison with

N.

a. melanura

and

N. a. seri of southern Sonora is unnecessary, both _being darker forms with _differing cranial details.

The

skull of

N.

a. seri is

somewhat

smaller

and

less massive, with narrowerfrontal region,smaller interparietal

and

_slightlysmaller auditalbullae.

Some

of the specimens ^of

N.

a. albigula from Sonoyta, Sonora, are pale

and

apparently

show

_gradation towardthe present form.

The

pallid colora- tion of three or fourexamples ^of N. _albigula from Tinajas Altas

and

vicinity

was

pointed out by

Mearns* who

contrasted

them

with _the darker animalsinhabiting the GilaRiver bottom. It

was

not until the accession of

new

material that the necessity ^of recognizing a

new

form

became

_apparent. Itis

named

forDr. E.A.

Mearns who

collectedspec- imensatthe type locality

more

than20 years ago.

Specimens examined.

—

_Ten, all from southwestern Arizonaasfollows:

*MammalsoftheMexican Boundary,Bui.56,partI,U.S.Nat. Mus.,p. 480, 1907.

Gila Mountains(near Tinajas Altas), 3; Granite Mountains(near Tule Wells), 1; Tinajas Altas (typelocality), 4; Tule_Wells, 2.

Neotoma

albigula sheldoni subsp. nov.

SHELDON WOOD

RAT.

T)/pefrom Pinacate Mountains (Papago Tanks), Sonora,Mexico, No.

206,812, U. S. National

Museum

(BiologicalSurveyCollection), collected by^CharlesSheldon, 1915.

General characters.

— A

dark colored form of the

N.

_{albigula group,}

differingfrom N. a. albigula

and

N. a. mearnsiinthe peculiar vinaceous bufliygeneral tone^ofthe upperparts.

Color.

— Type

_{(fresh pelage): Upperparts} in general vinaceous-bufF, purestonshoulders

and

_sides,the backrather stronglydarkened by^black hairs; head _grayish; underparts white, the ^fur pure white to roots on throat, chest,

and

_{inguinal region, as} usual in N. a. albigula^; ears

and

orbital borders blackish; ^feet white; ^tail sharply ^bicolor, black above, whitebelow. Inone specimenthe vinaceous-bufFof sidesextends across the

abdomen,

^{butthe throat}

and

chest arepure white^{as intheothers.}

Skull.

— About

likethatof

N.

a. albigula.

Measurements.

— Type

_{(dry skin):} Total length, 334; ^tail vertebrte, 136; hind foot, 32.5 Skull (type): Greatest length, 44; zygomatic breadtli, 23.1^; interorbital breadth, 5.5; length of nasals, 16.9; length ofanterior palatine foramina,8.9; length of palatal bridge, 7.4; length ofupper molar ^{series, 8.5.}

Remarks.

—

Inthe pronouncedvinaceous buffyshadeof the upperparts

and more

copious admixture of black, ^this form contrasts _strikingly with ^its exceedinglypallid relative,N. a. mearnsi, ^of the region along the international boundary, only 40 or 50 miles away.

The

two forms agree soclosely in cranial details, however, ^{that it} seems besttoregard

them

as subspecies.

The

dark colorof theforminhabiting the Pinacate Mountains seems^to beassociatedwiththatof itslavaenvironment. It is

named

for the hunter-naturalist, Charles Sheldon,

who

collected the material

which

forms the basis of this description,

and

_through

whose

interest

and

_generosity

much

has beencontributedtoour knowledge ^of

many

^North

American mammals.

Specimens examined.

—

_Ten, allfromthe Pinacate Mountains.

Noctilio leporinus

mexicanus

subsp. nov.

MEXICAN BULLDOG

BAT.

Type from Papayo,^Guerrero, Mexico. No. _126,672, male adult,U. S.

National

Museum

(Biological Survey Collection), collected

by

^E.

W.

Nelson

and

E.A.

Goldman,

April 17, 1903. Original

number

16,318.

General characters.

—

_{Closely resembling}

N.

I. leporinus

and N.

I.

mastivus but smaller, the difference insizemost noticeable in theskull.

Maxillary toothrow^short.

Color.

— Male

(type)^:

About

as in

N.

I. leporinus, the general ^{color of} upperparts ^{rich, dark,} ochraceous-tawny (Ridgway, 1912),

becoming

Goldman —Five New Mammals from Mexico and Arizona. 137 tawnyonthe head, with anarrow stripe of paler fur along median line ofback; underparts between zinc orange and tawny. Female: Upper- parts near buckthorn brown; underpartspaleyellow ocher.

Skull.

—

_{Similarin form tothoseof}

N.

I. leporinus

and

N. ^I. _mastivus, but smaller; maxillary toothrow shorter,the teeth relativelybroader, or

more

extended transversely.

Measurements.

— Type

_(dryskin): Forearm, ^83.2; tibia,37; foot,33.5.

An

adultmale topotype^: 83.9; 37.1; 32.9.

Two

adultfemale topotypes^: 82, 85.8; .35.5,36.8; 32, 31. Skull (type):* Greatest length, 28.5 (26.4, 26.2); condylo-incisive length, 25.2 (24.7, 24.3); zygomatic _breadth, 19.8 (18.6, 18.7); interorbital breadth, 7.4(7.1,6.8); length^ofmaxillary toothrow, 10.7 (10.4, 10.1).

Remarks.

—

Specimens from^various localities inSouth

America and

the

West

Indieshave been used forcomparison, ^ofwhichthosefrom Trinidad areassumedtorepresenttypical

N.

I.leporimis,^ while a pairfrom

Mono

Island have been taken to represent

N.

^I. mastivus, in the absence of material from_{the type locality,} the neighboring ^{island of} Saint Croix.

While

theexact status of N. I. leporinus

and N.

^I. mastivus seems not entirely clear. South American,

and West

Indian specimens from ^{as far} westasJamaicadiffer fromthe

Mexican

_series, especially in largersize.

The

malesin formsof

N.

leporinus are larger than the females. Occa- sional females,inthe

Mexican

_form, at _least,

may,

however, have ^fore-

arms

aboutaslong^asmalesofgreatergeneral dimensions.

Specimens examined.

—

_Nine, allfrom_{the typelocality.}

*Measurementsoftwoadultfemale topotypesⁱⁿparentheses.

fTypelocality,Surinam(seeThomas.Proc. Zool. Soc.London,p. 131,March,1911).