Description of a new Phyllostome bat from the Isthmus of Panama

VOL;

^{XV, PP. 83-84}

APRIL

25, 1902

PROCEEDINGS

OFTHE

X

^V-

BIOLOGICAL SOCIETY OF WASHINGTON

DESCRIPTION OF A NEW PHYLLOSTOME BAT FROM THE ISTHMUS OF PANAMA.*

BY MARCUS W. LYON,

Jr.

In

a small collection of bats recently received

by

^the

United

States

National Museum from Mr.

J.

W. _Humphreys

of

Colon, Colombia,

^are

two _specimens

of a species of

Uroderma

for

which no name

is available. It is closely related to

Uroderma bilohatvm

_Peters,

which was described from

Brazil

and Guiana.

Through

^the

^kindness

^{of Messrs.}

Witmer Stone and

J.

A. G.

Rehn

I

have been

able to

examine two _specimens

of

Uroderma bilohatum from

Brazil in the collection of the

Academy

^of

Natural

Sciences of Philadelphia.

Uroderma convexum new

species.

Tyjie.—FvoxD. Colon, Colombia, No. 111,722 United States National

Museum,

9 yg. ad. (inalcohol). Collected

May

28,1901

by

^J.

W. Hum-

phreys.

Characterft.—'ts\vt\\\2t,v to Uroderma bilobatum Peters, but with tooth rows_distinctlyarcuate.

Description oftype.

—

Upperparts nearthe sepia ^of Ridgway, ^{the hairs} lightening at base nearly ^to broccoli-brown; underparts light broccoli- brown, ^thehairswithshorthoary tips

making

^a general ^effect a little

*Published here by permission ^of the Secretary ^of the Smithsonian Institution.

19—BIOL. See. Wash. ^Vol. XV, 1902 (83)

84

Lyon — Nev^ Phyllostone Bat from

^Isthm'i(s

of Panama.

darker than the drab-gray^of

Ridgway.

^{Sideof head}

marked

_byapair of white_{bands, the}upper

band

extending fromthe posterior outeredge of the nose-leaf over eye nearl}^ toposterior edge of ear; the lower ex- tending fromangle^of

mouth

almost to tragus.

A

fine white line less prominent thanthe facemarkings extendsalongmiddle of back.

Length

^{of furonmiddleof}

back

about5

mm.,

below, 3-4

mm.

Nose-leaf

and

ears as in Urodermabilohatum.

The

nose-leaf appears smaller, butthespecimen

had

been placed ⁱⁿ formalin and afterwards dried beforereaching^the

Museum. The

rimsof theears

and

themar- gins^of the attached_portionsof the nose-leaf are whitish; the ears

and

nose-leafthemselvesaswell asthe

wing membranes

^{areblackishbrown.}

Skullandteeth essentially as in Urodermabilobatum.

The

tooth-rows of Uroderma convexumare decidedlyconvex andarcuate, andlessnearly parallelthanthoseof U. bilobatum. Allthe teeth in

U

^{convexum are a}

triflelargerthanthe corresponding^{teeth in}

U

bilobatum;

most

conspic- uous are the greater widths of the upper premolars and molars, es- pecially the last molars.

That

portion ^of the palate posterior ^to the lastmolarisdecidedly shorter

and

narrower in U. convexum than in U.

bilobatum.

The

rostrumof the

Panama

bat^isatrifleshorterand wider thanin the Brazilianspecimen

and

the nasals are flattened instead of beingslightly pinchedup.

The

sagittal crest^isaboutthe

same

size in each_species, but in U. bilobatv7nitdivides anteriorly^intotwo prominent lateral ridges, each of

which

terminates in a

more

or less prominent postorbital process; while in U. convexum these

two

ridges ^are lacking andthepostorbitalprocessesbutlittlemarked. This

may

^bepartly

due

to dift'erence inage^asthe

Panama

_specimenis

somewhat

_younger.

Measurements

of the _type, and of No. 4883 Acad. Nat. ^Sci. Phila,, from Chapada, ^Brazil: forearm, 43(42); longe.st finger, 92_{(92); tibia,} 16 (15); foot, 10 (10.4); calcar, 5 (5); nose-leaf from tip of lance tolower edge^ofrounded lobe _just above _lip, 9.4 _(11); greatestwidthof lance, 4 (5); greatest widthof rounded _portionof nose-leaf, 5((3); height ^of ear from notch ⁱⁿ front of antitragus, ⁹ (10 ; greatest width of ear, 8 (9);

greatest length of skull, 23.4 (24); greatest width _{of skull, zygomatic,} 13 (about ^13); front of incisors to posterior edge of palate, 11.4 (12.4);

length^of palate posterior^tolast molars, 2.0_(3.4); front of upper canine alveolus to posterior edge ^{of last} upper molar, 8

(8); greatest width between outer surfaces of ujiper molars at alveoli, 9.6 _(9.2); greatest length^of mandible 15_(15.6); front of lower canine at alveolus _{to pos-} terioredge^{of last}molar8.4_(9.2).

Remarks.

—

Uroderma convexumiscloselyrelated to U. bilobatum,andis

the only other

known

species^of thegenusas restrictedby Rehn.*

The

two cannot be distinguished by^external charactersalone, unless thereshould prove ^{to be color} ditf'erences.

The

two specimens from Brazil, in alcohol, are too

worn

and bleached for

making

^usefulcompari- sons.

The

_speciesisbased

upon

two specimens ⁱⁿ alcohol, anadult fe-

malethe_type,and another femaleofadultsize, but young. No. 111,721.

*Proc.Acad. Nat. Sci. Phila. (1900)p. 757, February9, 1901.