VARIATIONS OF GARTER-SNAKES. 



161 



by the above localities, except the specimens listed by Boulenger 

 (1893, 209) from Jalisco and Guerrero and the specimen said to have 

 been taken by Xantus at Cape San Lucas, Lower California. I 

 have elsewhere shown (Ruthven, 1907, 588-589) that there is undoubt- 

 edly a mistake in the latter record, in that the specimen upon which 



Fig. 70.— Distribution of Thamnophis eques, as indicated by the locality records. 



it was based very probably came from Arizona. As known at pres- 

 ent, then, the range of T. eques may be defined in general as all of 

 Guatemala, Mexico exclusive of the coastal plains, the Proplateau 

 region of southern Arizona and New Mexico, and the high plateau 

 region in the last two named States and western Texas (fig. 70). The 



