524 Bulletin American Museum of Natural History. [Vol. XXXVI, 



The close relationships of pittieri and inornata are particularly empha- 

 sized by the fact that in both, the crown is apparently always bright brown, 

 but little lighter in tone than the back, and with little if any black showing, 

 while in all the other forms of the prostheleuca group the amount of brown 

 on the crown is variable and, more or less frequently, black prevails. 



Just how intergradation, if it occurs at all, is accomplished with the 

 mountain-inhabiting eucharis is not clear, but it evidently does not occur 

 through inornata which in its typical form has been found at a locality but 

 2000 feet below points at which eucharis has been taken. The case is still 

 further complicated by the existence in the Cauca and Magdalena Valleys 

 of a bird which unfortunately cannot be referred to any of the described 

 forms, and which I therefore describe below under the name Henicorhina 

 prostheleuca albilateralis. 



Las Lomitas, 5. 



(34556) Henicorhina prostheleuca albilateralis subsp. nov. 



Char, subsp. — Similar to H. p. eucharis (Bangs) but less richly colored, the 

 general color of the back cinnamon-brown rather than auburn, the browji of the 

 flanks paler and less extensive, the sides with practically no gray, the auriculars with 

 less black. 



Type.— No. 122520, Am. Mus. Nat. Hist., c? ad., El Consuelo (alt. 3300 ft.), 

 western slope of Eastern Andes, above Honda, February 6, 1913; L. A. Fuertes. 



Of this race we have a second specimen from El Consuelo, which is even 

 paler than the type, three from Peque on the western slope of the Western 

 Andes in Antioquia, and three from Rio Frio in the Cauca Valley which are 

 slightly deeper in tone than the type, but which resemble it in the compara- 

 tive paleness and restriction of the brown in the flanks and which therefore 

 both in physical characters and faunal affinities are to be referred to the 

 Magdalena Valley race. In its unstreaked malar region and comparatively 

 white auriculars, this race is nearest specimens of leucosticta from the eastern 

 base of the Eastern Andes, but in the much paler coloration of its back and 

 flanks it is farther from that race than is any other form of the prostheleuca 

 group. 



Peque, 3; Rio Frio, 3; El Consuelo (above Honda), 2. 



(3456) Henicorhina inornata Hellm. 



Henicorhina inornata Hellm., J. f. O., 1903, p. 528 (Lita, n. w. Ecuador); P. Z. S., 

 1911, p. 1090 (Sipi). 



Found only in the Tropical Zone of the Pacific Coast. Our ten speci- 

 mens all exhibit the well-marked characters of thick bill, basally pale lower 



