ERRATA. 
In the list of illustrations, page 6, for ‘‘ Plate V’’ read ‘‘ Plate VI,’’ and for 
> Plate V1” read “*‘ Plate V.’’ 
In the legend to Plate I (frontispiece), in the list of illustrations and on the 
illustration, for ‘‘ Brooks’’ read ‘‘ Rooks.’’, 
In the legend to Plate VI, figure 2, in the list of illustrations and on the illus- 
tration, for ‘‘ Buffalo County, Kans.,’’ read ‘‘ Buffalo County, Nebr.’’ 
