ERRATA ET CORRIGENDA. 



For the account of the early discovery and conquest of 

 Yucatan, and for the measurements of the ruins of Uxmal 

 and Labna, the author is indebted to Stevens' "Incidents 

 of Travel in Yucatan » 



For the data used in the descriptions and measurements 

 of the mountains, and for the identifications of, and some 

 notes on, the birds and of the land and fresh-water shells, 

 the author is indebted to the papers of Messrs. Angelo 

 Heilprin, H. A. Pilsbry and Witmer Stone, published in 

 the proceedings of the Philadelphia Academy of Science, 

 1890-93. 



Page I, 4th line, for Orizaba read City of Alexandria. 



Page 81, 2nd line, for thermometer read barometer. 



Page 123, figure. This figure is inaccurate; the white band 

 on the end of the tail is absent in T- vociferiis, but 

 present in T- tyrannus- 



