264 



CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Remarks. — Our specimens from Tucson were caught close 

 to the Santa Cruz River. No. 33876 was caught at about 4 

 p. M. in a pool near a ditch. It was swimming several inches 

 below the surface of the water, seemingly in pursuit of small 

 fish which were very numerous in the pool. The snake soon 

 coiled up under some brush at the edge of the pool, and there 

 we captured it. On the morning of March 30, 1912, we were 

 walking along the banks of the Santa Cruz River hunting frogs 

 when we heard a cry similar to that of a young kitten. As we 

 drew nearer indistinct though loud croaking sounds could be 

 heard at intervals interspersed with the kitten-like cries. Soon 

 we discovered a garter-snake (No. 33877) of this species 

 coiled up on shore a couple of feet from the edge of the water 

 holding in its jaws a Rana pipiens which it had seized by one 

 hind leg and which was crying lustily. When we approached 

 still closer, the snake dropped the frog and both made for the 

 water, which the frog succeeded in reaching. 



Thamnophis angustirostris (Kennicott) 

 Brown-spotted Garter-Snake. 



m 



Diagnosis. — Normally with eight supralabials ; scales 

 twenty-one rows ; dorsal line absent ; dorsal spots numerous, 

 prominent; lateral lines showing faintly on second and third 

 rows of scales, or absent; no postoral crescents; usually two 

 preoculars ; infralabials usually ten, often nine. 



Type Locality. — Parras, Coahuila, Mexico. 



