Fig. 21. A probable case of Hybridism. 



1. Range of Bamphocelus^ icteronotus. 



2. Range of Ramphocelus chrysonoius and intergrades between Nos. 1 and 3. 



3. Range of Ramphocelus flammigerus. 



Nos. 1 and 2 are beKeved to intergrade by hybridization, producing No. 3. 



611 



