VARIATIONS OF GARTER-SNAKES. 



93 



in these localities tlian to the northward the southern mart^in may 

 be placed tentativel}^ at the Ohio River. '^ 



If we admit for the tim(^ being that hutleri and hrachystoma are 

 identical, we find that for twelve years after its description the type 

 of the latter (which was taken in Franklin, Venango County) repre- 

 sented the only Pennsylvania locality from which the form was known 

 to occur. In 1905, however, IMr. II. F. Fowler, of the Academy of 

 Natural Sciences of Philadelpliia, secured a second specimen (Stone, 

 1906, 165) near Port Allegheii}^, McKean Countj^. Tliis specimen is of 

 interest, as not only extending the range considerably to the east- 

 ward, but as also probably representing approximately the eastern 



423t:^ 



Fig. 30. DisTRiDUTioN of TuAMNonus hutleki, as indicated by the locality records. 



limit of its occurrence. These specimens will be further discussed in 

 the consideration of the variation of the group. 



At tliis point mention should again be made of the three specimens 

 in the U. S. National Museimi from Milwaukee,Wisconsin. I have given 

 my reasons for referring these specimens to radix, but it must be 

 admitted that the}^ resemble hutleri so closely as to be indistinguish- 

 able, and it may be that further material will show them to belong 

 to this form and extentl the range aroimd the southern end of Lake 

 Micliigan, but the solution of the problem given on page 85 seems 

 the most plausible one at present. 



It is impossi])le with our imperfect knowledge of iho limits of its 

 range to point out any close relations between tne distribution of 



oAs this paper is passing through the press I have received a specimen of hutleri 

 from Dayton, Ohio. 



