Bulletin A. M. N. H. 



Vol. XXX\^I, Plate XXIV. 



Alto Bonito, Rio Sucio 

 (Tropical Zone; Colombian-Pacific Faima. ) 



Rio Cauca at Puerto Valdivia 



View looking north, near the soiitliern limit of forest on the lower Cauca. The Central 



Andes arise from the right hand bank, the Western Andes from the left. At no 



other place do these ranges so closely approach each other. 



(Tropical Zone: Cauca-Magdalena Faxma.) 



