Two new tropical Old World bats

Vol. XV, ^pp. 245-246

December

16.1902

PROCEEDINGS

OF THE

BIOLOGICAL SOCIETY OF WASHINGTON

TWO np:w tropical old world bats."

BY GERRIT

S.

MILLER,

^Jit.

Among

^the

^{Old World}

^{bats in} the L^nited States

National

Museum

are representatives of

two forms

of

Molossidfe

that

have

not hitherto

been

described.

Both

are insular represent- atives ofwell

known

continental_species.

Nyctlnomus

pusillus sp. nov.

Type.—

Adult female (in alcohol), No.

UUf.

^{United States National}

Museum.

Collected on Aldabra Island, Indian Ocean, by ^Dr.

W.

L.

Abbott,

Characters.

—

_Externally similar to Nyctinomv.s pinnUuii. Skull and teeth noticeably smallerthan inthe related_species.

External_features.

—

_Insizeas wellas in detailsofexternalform_Nyctino-

mu8 punUvs

agreesso closelywithN._ptimilus as toneed no description.

Skull

and

teeth.

— The

skullissimilartothaiofN._{puwiluftexcept}that itissmaller

and more

lightly built, theinterorbital profile^is

more

con- cave, the basisphenoid pitsare better _defined,

and

the interpterygoid space^isrelativelywider. Teeth

much

smaller thanin X. _prnnih/sand innersegment^ofupper molarsrelativelybroader, sothat the protocone

and

_hypoconeof thefirstand secondare actually further apart than in the largerspecies.

Measvrements.

—

_External

measurements

of type^{: total} length, 84 ;

head

and

_{body, 53}; tail..31; tibia, 11; foot, 7.8(7)^: forearm,^{40.6; first} digit, 6.4^; second_digit, 35; third_digit,70; fourthdigit,58^: fifth digit, 34; earfrom meatus, ^{15.4; ear}from crown, 10; widthof _ear, 14.

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

49—BiOL. Soc. Wash. Vol. XV. ^190-'. (245)

246 M>.U>^r—Two

X<sic

Tropical Old World Bats.

Cranialnieasurementsoftype: greatest length,¹⁵(10. G);*basal length, i:;.4(14.8); basilarlength, ^12.8(1.'].4); zygomaticbreadth, ^9.2(10); inter-, orbital constriction, 3(3.6); greatestbreadthof braincase aboverootsof zygomata,8(8.4): lachrymalbreadth,⁵(0); mandible,10(11); maxillary loothrow_(exclusiveof incisors), 5.6(0.(5); mandibular toothrow _(exclu- sive of incisors),6_(6.8).

Specimens exandned.

— _Two,

_both from AldabraIsland.

Nyctinomus

jobensis sp. nov.

Ti/pe.

—

Adult male _(skinand skull), No.

i^JH

^{UnitedStatesNational}

Museum.

Collected at Ansus, Island of _Jobie, Northwestern

New

Guinea,

by

Dr. O. Beccari.

Characters.

—

Similartothe Indian Nyctimnuusplicatus(Buchannan)^as described by

Dobson

and _Blanford, but smaller

and

ear Avith

much

broader antitragus.

Earx.

— _The

ear exactly resembles Blanford's _figure (Fauna ^British India,

Mammalia,

p. 3.>1, December, 1891)except that the antitragus^is

much

broader, itswidth abovenearly equal ^toheight^at middle instead ofabouthalf thisheight.

The

anteriorborderofthe antitragus^isvery slightly convexinstead of_distinctlyconcave as figured.

Wings, membranes

and

other external features.-

—

Externally theanimal

clo.selyagreeswiththe descriptions^ofNyctinomusplicatus in^allrespects except ^theonejust jxiinted out.

Skull

and

teeth.

— The

skull israther robustin form, with high ^brain- case and cylindric-hourglass shaped interorbital region.

The

general appearance ^is very ^ditferent from the broad flat skull of Nyctinomus

(I'f/yptiacus,

and

strongly resembles

some

of the species of Promops.

Lachrymal

processes smallbut_veryprominent. Anterior palatinevacu- itynarrow. Teeth as in N. wgyptiacus except that the upper ^incisors are nearer together, thelower premolars^arelarger,

and

theupper molars ave_larger, thefirst

and

secondAvith

much

lessdistinct hypocone.

Measurements.

—

External

measurements

oftype: total length, 98:

head and

_body, 01; tail,37: tibia, 15; foot, 10.6 (10); forearm, 45; first digit, 7; second digit, 45; third _{digit, 90;} fourth _digit, 70; ^fifth digit, 42; ear from meatus,20; earfrom crown, 15; widthof_{ear, 20.}

Cranial

measurements

^of type: greatestlength, 19: basal length, 16.6;

basilar length, 15; zygomatic breadth, 11; interorbitjil constriction, 4;

greatest breadth of braincaseabove roots of zygomata,^9.4; lachrymal breadth,7; mandible, 13.4; maxillarytoothrow_(exclusiveof incisors), 7;

mandibular toothrow(exclusiveof incisors).^7.6.

Specimens examined.

—

_Six, all from _{the typelocality.}

liemarlcs.

— While

therecan be no doubtthattliis batisdistinct from NyctinomuspUcatus, originally described from Pattahaut, Bengal, ^I

am

forced_{to rely}onthepublished accounts^ofthelatter. Both Dobson and Blanford give the length ^of forearm inN.plicatus as50

mm.

_(1.95in.),

whilein thesixN._jobensisitranges from⁴⁴

mm.

to46

mm.

*Measurements

in parenthesis are those^of anadult male Nyctinomus ptimilusfrom Massowa,

Red

^Sea(No. fsfit)-