312 BULLETIN 133, UNITED STATES NATIONAL MUSEUM 



identical, so that without advantage of comparative material my 

 notes are given herewith under the typical subspecies. Doctor 

 Chapman's decision ®° that ockendeni of Hartert from Peru should 

 rank as a subspecies of keterogyna^ which he considers specifically 

 distinct from aterrimus, in my opinion, after examination of five 

 specimens (including a male from Carabaya, the type locality) is 

 erroneous. Though ockendeni, in addition to smaller size, and 

 darker coloration in the female, has a somewhat heavier bill, it 

 appears that it is a form of aterrimus. 



The male of the present species is distinguished from K. cyani- 

 rostris by the broad white band across the underside of the wing, 

 while the female is plain brown, unstreaked. An adult male of 

 aterrimus in the United States National Museum, collected at 

 Chilecito, La Kioja, Argentina, an abnormal specimen, has scattered 

 white feathers on the sides and abdomen. 



This form was encountered first at General Roca, Rio Negro,, 

 where the birds were fairly common from November 25 to December 

 2, 1920. An adult male was shot here on November 29, and females 

 on November 25 and 29. Part of the birds observed frequented 

 willow thickets along the Rio Negro, where they were probably 

 on their breeding grounds, while others were found in the open, 

 brush through the arid, gravelly hills to the north of Roca. The 

 number of these last varied from day to day, and it was my opinion 

 that the individuals in these areas were still in migration. The 

 birds rested on low perches, flirting the tail constantly, at intervals 

 darting out after small insects, or dropping down to run along for 

 a few feet on the ground. The flash of white from the wings of the 

 somberly clad males, as they took flight, was almost startling, while 

 the reddish brown color in the tail and rump of females in the glar- 

 ing desert sun appeared almost red. Their only note was a faint. 

 tseet. 



Later, at Tapia, Tucuman, the species was recorded from April T 

 to 12, 1921, and two specimens were secured, a male April 12 and 

 a female April 11. Here the birds were encountered along deep 

 barrancas in the ojDen forests, apparently in fall migration. The 

 male taken at Tapia is in full plumage, while the female is just 

 completing a fall moult. The two appear identical with specimens 

 from Rio Negro. 



In an adult male, taken November 29, the tip of the bill was black;, 

 base glaucous gray; iris Rood's brown; tarsus and toes black. A 

 female shot on the same date had the tip of the bill blackish; base 

 all around glaucous gra}', much duller on the maxilla; iris Rood's 

 brown ; tarsus and toes black. 



8» U. S. Nat. Mus., Bull. 117, 1921, p. 89. 



