AMPHIBIANS AND REPTILES OF BEXAB COUNTY 23 



46. Heterodon contortrix (Linne) Hog-nose Snake. 



Spreading Adder 

 Boa contortrix Linne, Syst. Nat., Ed. 12, Vol. 1, 1766- 



P- 373- 

 Mr. Marnock collected several in the Helotes neighborhood 

 and Mr. Garni records a single specimen from San Antonio. 



47. Opheodrys aestivus (Linne) Rough Green Snake : 



Southern Green Snake 

 Coluber aestivus Linne, Syst. Nat. Ed. 12, Vol. 1, 1766, 



P- 3$7- 

 Common in the wooded districts of Bexar County. 



48. Coluber flagellum flagellum (Shaw) 



Coachwhip : Whip Snake 

 Coluber flagellum Shaw, Gen Zool., Vol. 3, 1802, p. 475. 



A common species throughout Bexar County. 



49. Coluber constrictor flaviventris (Say) Western Racer: 



Yellow-bellied Racer. 

 Coluber flaviventris Say, Long's Exped. Rocky Mts., 



Vol. 2, 1823, p. 185. 

 The Baylor University collection contains a small example 

 if this species from near Helotes. I can find no published rec- 

 ords of its occurrence in Bexar County but several have been 

 reported from Comal and Kendall counties. 



50. Coluber schotti (Baird and Girard) Schott's Racer 



Masticophis schotti Baird and Girard, Cat. N- Am. Rept.. 

 Pt. 1, 1853, p. 160. 



Mr. Marnock collected several specimens of this rare spe- 

 cies in the Plelotes neighborhood. Two small examples are in 

 the collection of Baylor University. 



51. Salvadora grahamiae Baird and Girard Patch-nose Snake 



Salvadora grahamiae Baird and Girard, Cat. N. Am. 

 Rept., Pt. 1, 1853, p. 104. 



Mr. Garni collected five specimens of this interesting snak» 

 on the grounds of St. Louis College, ten miles from San Antonio. 

 Two of these he presented to Baylor University. Four speci- 

 mens collected by Marnock at Helotes are in the collection of 

 the same institution. 



