NOV. 4, 1921 WETMORE: NEW TINAMOUS 437 



Calopezus elegans albidus, subsp. nov. 



Characters. — Similar to Calopezus elegans morenoi Chubb but much paler 

 white spots and broken bars of upper surface large, the light markings of 

 the dorsal surface more extensive than the darker ones; feathers of lower 

 hindneck marked extensively with dull ivory yellow; Hght markings on under 

 surface more extensive. 



Description. — Type, U. S. Nat. Mus., Cat. No. 71061, adult (sex not indi- 

 cated), San Juan, Argentina. Feathers of crown and nape light drab, each 

 feather with a narrow median streak of dull black; loral region dull pinkish 

 buff, each feather streaked with dull black; superciliary streak paler than, 

 cartridge buff ; a narrow line extending beneath eye from base of nasal groove 

 dull pinkish buff, becoming whiter as it expands on the cheeks where it is 

 lined with dull black; malar streak dull black, the feathers bordered with 

 whitish; sides of head dull black, the feathers bordered narrowly with light 

 drab; elongate crest, composed of slender feathers slightly recurved at tip, 

 dull black, bordered narrowly toward base with light drab; hindneck between 

 smoke gray and light grayish olive, shghtly streaked with black; feathers 

 of lower neck and upper back dull ivory-yellow, with shaft streak and five 

 or more narrow bars of fuscous-black, the dark bars more or less broken and 

 interrupted; feathers of back, inner wing-coverts and tertials mottled and 

 barred with mixed ivory-yellow and fuscous-black, with an admixture of 

 drab replacing part of the lighter markings; rump and upper tail-coverts 

 similar to back but with bars of light and dark heavier and more distinct, 

 the light markings varying from ivory-yellow to nearly white; outer wing- 

 coverts barred irregularly but heavily with ivory-yellow and fuscous-black, 

 the light markings in places almost white; primaries and secondaries dull 

 fuscous-black; outer webs of primaries barred narrowly with ivory-yellow, 

 an indefinite broken bar of the same color on inner web; secondaries crossed 

 with irregular bars of ivory-yellow; rectrices barred narrowly with fuscous- 

 black and ivory-yellow ; throat dull white ; f oreneck and upper breast dull 

 ivory-yellow, each feather with shaft streak and several faint wavy vermicu- 

 lations of fuscous-black; breast, abdomen, sides, flanks and under tail-coverts 

 ivory -yellow barred broadly with fuscous-black; abdomen ivory yellow, the 

 abdomen tending to become immaculate toward center; thighs pale ivory- 

 yellow; under wing-coverts and axillars dull white, barred with fuscous-black. 



Measurements of type. — Wing 211 mm., tail 97.5 mm., tarsus 40.6 mm., 

 culmen 25 mm. 



Range. — Province of San Juan, Argentina. 



Remarks. — The pale coloration of Calopezus e. albidus distinguishes it at 

 a glance from other subspecies of the crested tinamou. It is as distinct from 

 C. e.formosus LiUo of eastern Tucuman and northwestern Santiago del Estero, 

 as from C. e. morenoi which ranges north into the Province of Mendoza. 

 The peculiarities of this pale form were described to me by sportsmen who 

 were familiar with it in the field, and who distinguished it from the darker 

 subspecies of other regions. The type, an old specimen in the U. S. National 

 Museum, has no definite locality assigned on the label other than the Province 

 of San Juan, but it seems probable that albidus ranges through the plains of 

 eastern San Juan. 



