Descriptions of new American birds

Vol.

XXIV,

pp. 187-190. June ^{23, 1911}

PROCEEDINGS

OFTHE

BIOLOGICAL SOCIETY OF WASHINGTON

DESCRIPTIONS OF NEW AMERICAN BIRDS.

BY OUTRAM BANGS.

The American

birdsdescribed as

new

in the following

pages

are

from

various sources,

and

are

such

as

have turned up ^from time

to

time during

the process ^of

arranging and

identifying the collectionsin the

Museum

of

Comparative

Zoology.

Rupornis

magnirostris occidua subsp. nov.

Type from Rio

Tambopata,

eastern Peru, adult

(d

¹?), no.47,."><>2, Coll.

Mus.

Comp.

^{Zool. Collected}by^Dr.

W.

^C. Farrabee, ⁱⁿ May, ^1907.

Characters.

—

Similar to true R. magnirostris (Gmelin) ^of Colombia, Guiana,

and

_Amazonia, with the upper parts pale gray

and

the _belly and flanks barred with white

and

_pale cinnamon-rufous, but with ^the chest brightcinnamon-rufousas in R. magnirostrisnatteri (Gel.

&

Salv.)

of Brazil,notgray^{as in true R.}magnirostris.

Measurements.

—

_Type, adult (<??): wing, 213; ^tail, 143; tarsus, 63;

culmen, ^29.

Remarks.

— The

_typeof this

new hawk

was brought

home,

^{with other}

birds, by Dr. Farrabee,from his three years' trip toPeruand Bolivia. I

tried in vain to reconcile it to either of the recognized subspecies, and

upon

hunting

up

^{the literature found that} Hellmayr^{(Novit. Zool. Vol.}

XVII,

p. 411, Dec. 1910)

had

already discussed similar specimens, from the

same

_{generalregion,arriving}atthe conclusion _{that, in} all probability, they represented ^a third subspecies, intermediate ⁱⁿ character between theother two.

Penelope

perspicax sp. nov.

Type from San Luis, Bitaco Valley, western Colombia, ^adult 9, Mus.

Comp.

Zool., no. 23,606,

Bangs

^{Coll. Collected}

June

5,1908,by

Mervyn

G. Palmer.

('haracters.

— _Somewhat

likeP.cristata (Linn.)ofCentral America but

much

smaller

and

with the feathers of _crest,hindneck

and

mantlebor- dered by grayish white; wings, except primaries

and

bastard wing, metallic; bronzy brownish-like _tail; primaries metallic, dark, greenish

34—Peoc.Biol. Soc.Wash., Vol.XXIV,1911. (187)

188 Bangs —

Descriptions of

New American

Birds.

olive (in P. cristata thewhole

wing

^is of this latter color).

About

the sizeofP.boliviano,Bp.^ofPeru

and

Boliviaandwith similar grayish white edging^tofeathers of upperparts, but with under_parts as in P. cristata with thechestnutrestricted tolower _belly

and

undertailcoverts.

Measurements.—

Type, ^adult 9^: _{wing, 289;} tail,292; tarsus,82.5; cul-

men,

^34.5.

Remarks.

—

In the collections

made

in western Colombia by

M.

G.

Palmer,

which

^Igot^ofRosenberg,^therewere but twoskinsof thisappar- entlyverydistinct species,onethe_type, theother a

young

^bird justable to _flytaken atPavas,

March

29, 1908.

Antrostomus

rufus otiosus subsp. nov.

Type from ^{the island of St.} Lucia,

West

_Indies, adult

d\

no. 28,674, Coll. Mus.

Comp.

^{Zool. Collected} by

John Semper

^{in 1878or 1879.}

Characters.

—

Similar to true A. _rufus (Bodd.) ^of continental South

America

(north^to

Panama),

^but

much

_larger, with a heavierbill.

Measurements.

—

Bangs —

Descriptions of

New American

Birds.

189 Thamnophilus

^{doliatus catus} subsp. nov.

Cotypes from El Valle, Margarita Island, Venezuela,adults, cT and 9, Mns.

Comp.

^{Zool. nos. 2712 (}

d

^{1 )} and 2715 ( Q ), Bangs ^{Coll. Collected} by Austin ^II. Clark July ^L4(d") and_July 7 ( $ ), 1901.

Characters.

—

Similarto T. doliatusfraterculus Berlepsch

and

Hartert of Venezuela andTrinidad, but

somewhat

smallerwith

somewhat

smaller bill; adult c? with the black hands below^still narrower

—

theunderparts being white very narrowly and ^rather irregularly barred with black;

whitebands on ^tailasin T. doliatus doliatus (Linn.) ^ofSurinam. Adult 9 exceedingly pale, the upper parts, except piliura, ochraceous,^as pale as in the Yucatan form T. doliatus yucatanensis Ridg., from which the female ofthe

new

formdiffers littleexcept ⁱⁿsmallersize.

Measurements.

—

No.

190 Bangs —

Descriptions of

New American

Birds.

Remarks.

—

This

new

formofthe vermilion tyrant-bird occupiesYuca- tan, British

Honduras and

_parts ofGuatemala.

The

specimens which ^I have

examined

are conspicuously^differentfromthe

more

northernrace.

Itscharacterswere_fullypointed out by

Ridgway

^{in Birds of North}

and

Middle America, but^it

was

not_{given a}

name

_bythat distinguished^orni- thologist.

Leistes superciliaris petilus subsp. nov.

Type from Concepcion ^del Uruguay, ^adult

d\

no. 31,023, Mus.

Comp.

Zool. Collected

November

27, 1880, by

W.

^B. Barrows.

Characters.

—

SimilartotrueL. superciliaris Bp. ^ofBrazil in color, but decidedly smaller, with a shorterbill, wing^{inadult c?}about98_(inadult c? ofL. superciliaris superciliaris about₁₀₅₎; culmen in adult _cfabout 19.5 (inadult (J¹ ofL. superciliaris superciliaris about_22.5).

Measurements.

—

No.