18 THE AMERICAN MIDLAND NATURALIST 



have been personally examined by the writer are included.* Definite records 

 in the literature, however, are also listed but only a certain few of them. The 

 bulk of the material upon which the Ohio records of such authors as Paird 

 and Girard (1853); Smith (1882), Yarrow (1882), Cope (1900) and Morse 

 (1904) were based, has been seen by the present writer, and since all of these 

 specimens are listed under the locality records for each species it is superfluous 

 to repeat the many published records. Consequently, of the latter, only those 

 are given where the specimens have been lost or where the writer has failed to 

 examine them. If there is any doubt as to the accuracy of the locality, or of 

 the identification of any of these, they are not included. 



In the case of all preserved specimens the collection to which they belong 

 and the museum number, if any, is indicated immediately following the local- 

 ity. The letters used to denote the various collections are the initials of the 

 institutions or of the private owners. A list of these begins on page 2. 

 Localities not followed by any designation refer to specimens examined by the 

 writer but which were not preserved. 



The distribution maps of the various species have been prepared from the 

 lists of locality records and here again certain policies have been followed. 

 Specimens recorded with no more detailed locality than just the county are 

 plotted on the maps near the center of the county in question and are accom- 

 panied by a capital letter "C." In cases where a more definite record from 

 within the borders of the same county is available, the unqualified county 

 record is not plotted upon the map. Likewise in the case of township records 

 if a definite locality from within the borders of the township is available, an- 

 other locality stated merely as the township is not plotted. 



The spots have been placed upon the maps with as much accuracy as 

 possible. Solid symbols indicate localities from which the writer has seen 

 specimens; hollow ones show additional localities reported in the literature. 

 The dark lines crossing the maps show the boundaries of the physiographic 

 regions. 



The small inset maps of the United States accompanying each of the Ohio 

 distribution maps indicate, by means of a solid dark area, the general range 

 of the species or subspecies concerned. Several of the forms occurring in Ohio 

 have ranges extending beyond the borders of the United States. In these 

 cases the advantage of using a United States map, as against a map of 

 North America of the same size, is felt to be sufficient to outweigh showing 

 the complete ranges. The latter are stated in the text for each form. 



It should be remembered that the inset maps are merely indicative of the 

 ranges and must not be relied upon for exactness. Detailed locality maps 

 showing the complete ranges of the various reptiles occurring in Ohio are 

 very few. Except for those appearing in Blanchard (1921 SC 1923), Orten- 

 burger (1928), Ruthven (1908), etc., they are non-existent. In most cases 

 the ranges are still too poorly known to be shown with accuracy. 



* A few records of common species, made chiefly in 1935, are included even though 

 the sp>ecimens have not been seen by the writer. This material is now in 

 museums and has been identified by competent herpetologists. 



