ERRATUM. 
On page 8o line 10, read (instead of as printed) :—There 
are nine known species of this genus:—A4. ferus, A. rubri- 
rostris, A. albifrons, A. gambeli, A. erythropus, A. fabalts, 
A. serrivostris, A. brachyrhynchus, A. indicus, of which the 
following three have not yet, as far as I know, been domesti- 
cated :—rubrirostris, gambelt, serrirostris, 
