REPTILES AND AMPHIBIANS OF TEXAS 35 



99. PiTYOPHis CATENIFER SAYI Schlegel. Bull Snake. 



Western half of the State, east, locally, to Wich- 

 ita, McLennan, Victoria and Cameron Counties. In 

 Central Texas it is by no means a common snake, but 

 some of the largest specimens that I have ever seen 

 came from this section. 



100. Zamenis constrictor constrictor Linn. Black 



Snake. 

 Probably the true Zamenis constrictor does not 

 enter Texas, but the black racer of the northeastern 

 section of the State is very near to the typical sub- 

 species and differs greatly from flaviventris. The 

 racer snakes of Texas are a curious lot, presenting 

 the characters and every type of coloration known 

 to the several races inhabiting North America. The 

 black form is principally confined to the northern 

 and northeastern sections, but an occasional specimen 

 is found as far south as Bosque and McLennan Coun- 

 ties. 



101. Zamenis constrictor flaviventris Saij. Yellow- 



bellied Racer. 

 This racer probably inhabits the greater por- 

 tion of Texas, but has been recorded from only a few 

 scattered localities. The type of Cope's Zamenis 

 stejnegerarius was from Cameron County. Garman 

 mentions a specimen from Deming's Bridge, Mata- 

 gorda County, and I have seen one from Burnet Coun- 

 ty. In the prairie district of McLennan County this 

 snake is by no means uncommon and I have had 

 several from the Brazos bottomlands from Waco 

 south to Bryan. McLennan County specimens are 

 very variable in the color of the upper surfaces, but 

 the underparts are usually yellow. One young exam- 

 ple was blotched with bright red. 



102. Zamenis flagellum Shaw. Coachwhip Snake. 



The "prairie runner" is a common snake over the 

 greater portion of the area of the State. It ap- 



