Chapman — New Birds Peru, Bolivia, Brazil, Colombia. 265 



Myioborus melanocephalus bolivianus, new subspecies. 



Subspedfic characters. — Similar to Myioborus melanocephalus melano- 

 cephalus (Tsch.) of Peru, but under parts paler, lemon-chrome rather than 

 light cadmium; frontal band narrower and often mixed with black; the 

 outer tail-feathers with more white, the white area on the inner vane of the 

 terminal half of the third feather (from without) larger than the black area; 

 wing averaging shorter; bill longer; wing 67; tail 67; culmen 10.5 mm. 



Type.— No. 137,927, Am. Mus. Nat. Hist , & ad., Incachaca, 7700 ft., 

 Prov. Cochabamba, Bolivia; May 24, 1915; Miller & Boyle. 



Specimens examined. — Myioborus melanocephalus bolivianus. Bolivia: 

 Type locality, 5 d\ 11 9- 



Myioborus melanocephalus melanocephalus. Peru: San Miguel Bridge, 

 Urubamba Canon, 5^,4 9 ; Torontoy, 1 d" , 4 9 ; Santo Domingo, 

 6 cf, 1 9 ; Oconeque, 1 cf. 



Remarks. — Specimens from Santo Domingo and Oconeque in south- 

 eastern Peru are intermediate. In the color of the under parts they are 

 nearer bolivianus, but in tail characters they agree with true melanocephalus. 



Basileuterus luteoviridis superciliaris, new subspecies. 



Subspedfic characters.— Similar to Basileuterus luteoviridis luteoviridis 

 (Bonap.) of Colombia, but averaging slightly smaller, with a longer bill, 

 rictal bristles more developed; the entire upper parts decidedly browner, 

 the yellow superciliary much broader, brighter, in some specimens broader 

 even than in " Myiothlypis" nigrocristatus, when it leaves an olive-green 

 area on the crown about equal to the black area in the crown of that species. 

 Differing from Basileuterus luteoviridis slriaticeps Cab., and from B. I. 

 signatus Berl. & Stolz. through the lack of even a trace of black on the 

 forehead and crown, which is exactly concolor with the back; from speci- 

 mens of signatus which lack black on the crown, it differs as it does from 

 true luteoviridis and, furthermore, in being larger; wing 69.5; tail 57; cul- 

 men 12 mm. 



Type.— No. 273,009, U. S. Nat. Mus., <? ad. Above Torontoy, 14,000 

 ft., Urubamba Canon, Peru; May 14, 1914, E. Heller. 



Specimens examined. — Basileuterus luteoviridis superciliaris. Peru: 

 Type locality, 3; Cedrobamba, 12,000 ft., 1. 



Basileuterus luteoviridis luteoviridis. Colombia: 4. 



Basileuterus luteoviridis signatus. Peru: San Miguel Bridge, Urubamba 

 Canon, 5000 ft., 4 d\ 2 9 ; Torontoy, 7800 ft., 2 cf , 4 9 ; Santo Do- 

 mingo, 6000 ft., 4; Oconeque, 1. Bolivia: Incachaca, 7700 ft., Prov. 

 Cochabamba, 5. 



Remarks. — This form is apparently a Temperate Zone representative 

 of Basileuterus luteoviridis signatus which occurs on the same mountains 

 in the Subtropical Zone. Its zonal relations are presumably with "Myi- 

 othlypis" slriaticeps Cab., 1 described from Maraynioc, in the humid Tem- 

 perate Zone, east of the Junin region. The latter, however, is larger and 

 is described as having "einen breiten schwarzlich olivenbraunen " stripe 

 ij. f. O., 1873, p. 316. 



