62 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 74 



man to show that the Colombian bird, to which Sharpe had applied 

 the name auncvlaris, is easily distinguished from the much more 

 brightly colored true tristriatus, but even he did not discriminate 

 betAveen the birds from the Eastern Andes on the one hand and 

 those from the Central (western slope) and Western Andes on the 

 other. "With considerably more and much better material than he 

 handled I find that the latter differ as above said, being conspicu- 

 ously duller and paler below — straw yellow, the crissum decidedly 

 buffy, the flanks much duller, ecru olive. The edgings of the wings 

 and tail are also nearer orange citrine, instead of dark citrine. 



Four specimens from western Ecuador in the collection of the 

 "Warsaw ]\Iuseum bear on their labels an unpubli^^hed manuscript 

 name in M. Stolzmann's hand, showing that he was long ago aware 

 of their distinctness. 



Xo. 134,101, Collection American Museum of Xatural History, La 

 Frijolera, Colombia, now before me. is indistinguishable from typical 

 tristriatus^ and Doctor Chapman suggests that it maA' be a mutant. 

 It is odd to find an individual with the characters of another and 

 very different form turning up within the range of an ally. 



No. 67,312, Collection Carnegie Museum, June 21, is in juvenal 

 dress, which is much duller and more uniform throughout than in the 

 adult, with the pileum colored like the back. Two others taken 

 June 19 are a little further along, and have acquired the crown- 

 stripes. 



Specimens examined. — Colombia : Heights of Caldas, 1 ; Bitaco 

 Valley, 9; La Cumbre, 6; La Frijolera, 1: Las Lomitas, 2; San 

 Antonio, 9 (including type); Gallera, 2; Cerro Munchique, 1; 

 Miraflores, 5; Salento, 2; El Roble, 3: Cocal, 1; La Maria, Dagua 

 Valley, 2; near Pavas, 1. Ecuador: Junction Chanchan and Chigu- 

 ancay Kivers, 1; Gualea. 1; Pedregal, 2; El Placer, 1; Cayandeled, 

 2. Total, 52. 



BASILEUTERUS TRISTRIATUS CHITRENSIS Griscom 



Basileuterus tristriatus chitrensis Gkiscom, Amer. Mus. Nov. No. 280, 1927, 

 p. 13 (Chitra. 4.000 feet, W. Panama: type in coll. Amer. Mus. Nat. 

 Hist). 



Suhspecific characters. — Similar to Basileuterus tnstiiatus melan- 

 otic^ but under surface deeper, more greenish yellow, especially on 

 the throat and breast. 



Measurements. — Male (three specimens) : "Wing, 60, 63, 68; tail, 

 53, 54, 60; bill, 11, 11, 11.5; tarsus, 20, 20, 22. Female (three speci- 

 mens) : Wing, 58, 68, 60; tail, 50, 51, 54; bill, 10.5, 11, 11; tarsus, 

 20, 20.5, 20.5. 



Range. — Subtropical Zone of Veragua, western Panama, 



