A new hummingbird of the genus Chlorostilbon from Brazil

Vol.

XXVI,

pp. 63-64 March _22,1913

PROCEEDINGS

OFTHE

BIOLOGICAL SOCIETY OF WASHINGTON

A NEW BUMMINGBIRD OF THE GENUS CHLOROS- TILBON FROM BRAZIL.

BY

J.

H. RILEY.

[By permission^oftheSecretaryoftheSmithsonianInstitution.]

While arranging the

^{collection of}

hummingbirds belonging

^to

llif

U.

S.

National Museum,

^I

^ran

across three

specimens

belong-

ing

^{to the}

genus

Chlorostilbon that I

have been unable

toidentify

and have reached

the

conclusion

that

they belong

^to

an unde-

scribed _species. It

may ^be known

as :

Chlorostilbon puruensis sp.nov.

Type.—U.

^{S. National}

Museum,

^No. 177,034, adult male, Hyutanihan, just below fallsofthePurusRiver, Brazil,

March

24, 1910. Collected

by

J. B. Steere.

Characters.

—

Differs:from Chlorostilbon prasinvsdaphne ^{in the} darker toneof the green above, ⁱⁿthe bluish tinge on _{the chin,} in the brighter and

more

brilliant green below, ⁱⁿ the longerbill,

which

isalsobrownish on the lowermandible_(black in C. p. daphne),

and

inhavinga longer

tail.

Description.

— _Above

_{brightgreen with coppery}reflections, dulleronthe top^ofthehead and uppertail-coverts; chin bluish green; throat, breast

and abdomen

brilliant, shiningcopperygreen; the bellyandflankswith

some

whitecottuny feathers, mostly^concealed; undertail-covertsnearest bottlegreen; ^{tail steelblue;} wingcoverts coloroftheback; flightfeathers purplish blue; upper mandible black, lower mandible brownish,except at extreme _tip(probably ^{dull reddish in life).}

Wing,

47.5; tail, 29;

culuien, 18nun.

Remarks.

—

Thisfine species ^isfounded

upon

^an

immature

and twoadult niales, all from_{the type locality.}

The

other adult ^ismolting

and

some- what dullerthan the type; the

culmen

measures 19.5

mm.

Five adult malesof C._p.daphne average^: wing,^46.1; tail,21.8; culmen,^16.1

mm.

1have not^aspecimen of typical C. p.prasinus, butjudging fromdescrip- tionsand theclosely relatedforms, thespecies^isquite^distinct. Lesson's type ^ofOrnismya prasina most ^likely

came

from the coastofBrazil

and

not fromtheinterior.

13-Proc.Biol. ^^c.Wash., Vol. XXVI,^1913. (633