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Bulletin American Museum of Natural History. [Vol. XXXVI, 



Fig. 11. Range of Osiinops decamanus. A Tropical Zone, Amazoniaxi species which enters Colombia 

 from the east, extends southward up the Magdalena and Cauca Valleys and westward to western Panama, 

 but is unknown on the Pacific Coast of Colombia except on the lower Atrato. Dotted area — General South 

 American range. Black area — Range west of the Andes. 



