60 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 74 



Basileuterus tristriatus (not Myiodioctes tristriatus von Tscbudi) von 



BsaiLEPSCH, Journ. f. Orn., vol. 32, 1884, p. 283 (Bncarnmanga and 



"Bogota.'' Colombia; crit.). 

 Basileuterus aurlcularis Sharpb. Cat. Birds Brit. Mus., vol. 10, 1SS5, p. 



386, part ("Bogota," Colombia; orig. de.scr. ; type [not designated! in 



coll. Brit. Mils.). 

 Basileuterus tristriatus trif-triatus HEnxMAYR, Proc. Zool. Soc. London, 



1911, p. 1091, part ("Bogota," Colombia; crit.). — Chapman, Bull. Amer. 



Mus. Nat. Hist., vol. 36, 1917, p. 551, part (La Candela, La Palma, San 



Agustin, and Fusugasuga, Colombia; crit.). 

 Basileute}'us tristriatus auricularis Chapman, Amer. Mn?. Nov. No. 143, 



1924, p. 4 (Colombia; crit.), p. 7, part (diag. ; range; Andes of Colombia), 



p. 8 (meas.). 



Suhspeclfc characters. — Similar to Basileuterus tristriatus haezae^ 

 but still paler and duller below (between baryta yellow and Martius 

 yellow), with the darker flammulation on the breast more pro- 

 nounced; 3-ellow of median croAvn-stripe paler and less in evidence. 



Measurements. — Male: Wing, G2-G8 (average, 67); tail, 55-60 

 (58); bill, 10-11 (10.5); tars^us, 19-21 (20). Female (four speci- 

 mens) : Wing. 60-64 (62) ; tail, 52-57 (55) ; bill, 10-11 (10.5) ; tarsus, 

 19-20.5 (20) r 



Range. — Subtropical Zone, Eastern Andes and eastern slope of 

 Central Andes, Colombia. 



/ie?)iarks. — When Sharpe described this form he must have com- 

 pared it with specimens from eastern Ecuador which he believed 

 represented B. tristriatus, but which we now know really belong to a 

 diiferent race, B. t. haezae. Under his new form he placed specimens 

 from three different localities, " Bogota," Colombia, Pallatanga, 

 Ecuador, and Simacu, Bolivia, failing to discriminate among thorn, 

 whereas the present study has shown that specimens from the locali- 

 ties in question represent as many different races. Unfortunately he 

 did not designate a type, but Doctor Chapman has by implication 

 already restricted the type locality to " Bogota,'' Colombia, which 

 designation is acceptable. With more ample material at his com- 

 mand than any previous author, he has shown that auriculans is a 

 perfectly valid and easily recognizable race, although Doctor Hell- 

 mayr, writing in 1911, did not see how it could be maintained. With 

 Doctor Chapman's conclusions my own agree, after handling the same 

 material he had before him and considerable in addition, and I would 

 even go further than he did and separate the birds from the Western 

 Andes under another name, as shown beyond. 



Specimens examined. — Colombia : Las Ventanas, 5; Cachiri, 1; Rio 

 Negro, 1; Boca del Monte, 2; "Bogota," 6; near San Agustin (5,000 

 feet), Huila, 1; La Palma (5,000 feet), Huila, 1; La Candela (6,500 

 feet), Huila, 3; Aguadita, above Fusugasuga (6,500 feet), 1. 

 Total, 21. 



