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Mixed Diglossini, Apr. 22, 1965, II         82 

tanager or finch in a mixed flock. 

[[left margin]] Coer Cy [[/left margin]] 
2    The ranges of Coers and Cys overlap broadly, but individuals of the two species do not seem to come into contact with one another. Nor do their Songs seem to overlap (but I have heard Coers sing only very rarely). Probably the "chemical" mutual avoidance and inhibition effects are (still) controlling the interactions of these two species. 

[[left margin]] Humer Bari[[/left margin]] 
3    Humers do not seem to consider Baris members of their own species. But they certainly are hostile to Baris. Hostility revealed by actual attacks. As Baris are not singing now, I cannot say anything about the relationships between their songs and those of Humers. Certainly, there is no positive evidence to indicate that there is any mutual avoidance or inhibition between Baris and Humers. 

[[left margin]] Humer Scan [[/left margin]] 
4    The relationships of Humers to Scans are much the same as their relations to Baris. But, in addition, the Songs of Humers overlap those of Scans (frequently?) 

[[left margin]] Scan Bari [[/left margin]] 
5    The relationships of Scans to Baris are much the same as the relations of Humers to Baris. 

[[left margin]] Humer Laf [[/left margin]] 
6    Humers and Laf may still regard one another as members of the same species. 

[[left margin]] Laf Cy [[/left margin]] 
7    The relations between Lafs and Cys are peculiar and variable. Sometimes mutual avoidance and inhibition in effect. Sometimes they treat one another as members of the same species (or at least Lafs treat Cys as they would other Lafs). At still other times, they show a certain "intermediate" type hostility toward one another. Revealed, presumably, by overlapping songs.