A new genus of sac-winged bats

Vol. XIX, ^pp. 59-60

May

1, 1906

PROCEEDINGS

OFTHE

BIOLOGICAL SOCIETY OF WASHINGTON

A NEW GENUS OF SAC- WINGED BATS.

BY GERRIT

^S.

MILLER,

^JH.

While examining

^the bats in the

Royal

^{^luseuni of}

Natural History

at Berlin,

kindly placed

^at

my

disposal l)y Prof.

Karl

JNIobius

and

Prof.

Paul Matschie,

^I

found

four

specimens from Surinam

collected

by Kappler and

labeled

by

^{Peters as}

Cormura

brevirostris.

On _comparing them with

the original description

and

_figure ofthis

genus,* however,

striking discrepancies

were

at once,

apparent. Another specimen

^ofthe

same _animal, from Baranciva,

Brazil,

was

sent

me _by Dr. Lorenz von Liburnau

of

Vienna, with

^the

information

thatthe

type

^of

Cormura,

originally in the

Natural History ^Museum, can not now

be

found. The genus Cormura

^{therefore rests}

wholly on the

_plate

and

_descrip-

tion;

and

as these

do not

_agree

with

the

specimens

^{it is neces-} sary ^to

name

the

animal

represented in the

museum

of

Vienna and

Berlin.

Myropteryx

^{gen. nov.} {EmlxiUonuridne)^. Type.

—

_{Myropteryxpullussp.} nov.

Characters.

—

_Externallymost _nearlyresembling Peropteri/x, ^witli

which

itagrees ⁱⁿi)ositionofwingsacs,but with broader head

and more

_widely separated^ears. Skull essentially likethat oiISiiccnpleryxbut with_shorter, relativelydeeper^rostrum. Teeth_differingfromthose ofallthe previously

known

_{sac-wingedgenera}in the absenceof

hypocone

^{in first}

and

second uppermolar,

and

inthe minute, earlydeciduous upper^incisor.

Retnarks.

—

Thisgenus ^iswell characterized

by

^thecomplete absence^of hypocones in the_upper molars,

and by

the great reduction of theupper incisors. Inthefouradults

examined

theupper^incisors are absent. In an

immature

individual,however,^{there are}two_veryminuteteeth ineach premaxillary. Wiietlier thiscondition isnormal canonly be conjectured, but neither tooth has theappearance^ofa

remnant

of themilk_dentition,

no

traceofwhich can be foundelsewhere. Inthe description ofCormura theupper^{incisors are}merely^{said to}be extremelysmall,while the_figure

*Peters,Monatsber.^k.preuss.Akad. Wissensch.,Berlin,1867, p. 475, pi. p. 480.

13—Pkoc. Biol. Soc. Wash.,^Vol-. XIX, ^{190G. (.'i9)}

60 MiUn —

-.4 Nfnv

Genus

of Sac-

Winged

^Bats.

shows them

ofnormalsizefor

members

ofthe group.

No

^{mention is}

made

ofthe hypocones^oftheuppermolars,but these cusps are unmistakably indicatedin the_plate.

Myropteryx

pullus sp. nov.

Type.

—

Adult female (in alcohol). Royal

Museum

ofNatural History, Berlin. CollectedinSurinam,

by

Kappler.

CluiracU'rs.

—

_General ajipearance

much

as in I'eropteryx canina, but larger,

and

with broader _head,less pointed muzzle,

and

_slightlysmaller,

much more

_{widelyseparated} ears (distance between ears aboutone-fifth height of earfromcrownin Peropleryx,aboutone-halfinMyropteryx).

Ear

of essentiallythe

same

form as that of Ferupteryx canina,but _antitragus

less distinctly

marked

off,

and

_tragus broader

and

a little bent forward

owing

to slightconcavity of anterior border. Color

when

^dried

mummy-

brown

_{above, cinnamon,}tinged with drab _{below, the} hairs everywhere becominglighter atextreme_base,

and

tho.seofback_faintlydarkerat_tip.

Mea-mrements.— Type: ^Total length, (37; (61)*; ^{tail, 12} (13); tibia,16 (16); foot, 6.8 (7); forearm, ^43.6 (45)^;

thumb,

⁹ (9); secondfinger,37.6 (37); third _finger,76 ₍₇₅₎; fourth _finger, 52 (51); fifth finger, 51 (49) ;

earfrom_{meatus, 14.4 (14)}; .ear from crown,11.4 (11)^; widthof _ear, 10.4 (10.4).

*Measurementsin parenthesis are those ofanadultmalefrom the typelocality