Vol. XXXIII ~ „, 



1915 J Chapman, The Genus Scytalopus Gould. 409 



Scytalopus magell aniens { = nigerf] grandis Cory. N.Peru, about 

 thirty miles N. E. of Chachapoyas. 



Scytalopus unicolor Salv. Cajabamba, Peru. 



Scytalopus obscurns (King). Southern Chile. 



Scytalopus acutirostris (Tsch.). Peru. 



Scytalopus macropus Berl. & Stolz. Maraynioc, Cen. Peru. 

 ^ Scytalopus micropterus bolivianus (Allen). Southern Peru; Bo- 

 livia. 



Scytalopus speluncoe (Menetr.). Southeastern Brazil. 

 Scytalopus indigoticus (Wied). Southeastern Brazil. 

 _ Scytalopus superciliaris Cab. Sierra of Tucuman, western Argen- 

 tina. 



It will be seen that with the exception of Scytalopus indigoticus 

 and S. speluncxE, all the known species are confined to the Andes, 

 or, south of Bolivia, to the country at their base. 



Such information as I can gather concerning these two species of 

 eastern Brazil, leads me to believe that they inhabit the mountains 

 at some altitude, possibly above the upper limits of the Tropical 

 Zone. However this may be, it appears that of the species which 

 are found in various parts of western South America from Cape 

 Horn to Costa Rica, not one inhabits the Tropical Zone. In Colom- 

 bia this implies that Scytalopus is not found below an altitude of 

 4,000 feet, and, as a matter of fact, only three of our specimens were 

 taken below this level. 



From the lower limits of the Subtropical Zone we have found 

 Scytalopus in Colombia as high as 12,700 feet and consequently in 

 the Paramo or Alpine Zone. Each species has its center of abun- 

 dance in a certain Zone but where local conditions cause the over- 

 lapping or inosculation of zonal boundaries so do the ranges of their 

 characteristic species overlap and inosculate. 



Thus, although S. m. micropterus is characteristic of the Subtropi- 

 cal Zone, we have two specimens from an altitude of 10,000 feet in 

 the Temperate Zone. On the other hand, S. niger is a Temperate 

 Zone species but occurs also in the upper part of the Subtropi- 

 cal Zone at an/ altitude of from 8,000 to 8,500 feet. The Tem- 

 perate Zone is indeed the center of abundance of the genus and, in 

 Colombia, only S. m. micropterus and its representative S. sanctce- 

 martce range much below it. 



