1922] Schmidt, Amphibians and Reptiles of Lower California 697 



Tantilla planiceps (Blainville) 



Coluber planiceps Blainville, 1835, p. 294, PI. xxvn, figs. 3-35. 

 Tantilla planiceps Stejneger and Barbour, 1917, p. 105. 



Range. — Southern Lower California. 



Lower Californian Records. — San Jose" del Cabo, Sierra Laguna, Van Den- 

 burgh, 1S95, p. 140; Santa Rosalia, San Ignacio, Mocquard, 1899, p. 316. 



Trimorphodon lyrophanes (Cope) 

 Lycodon lyrophanes Cope, 1860a, p. 343. 

 Trimorphodon lyrophanes Stejneger and Barbour, 1917, p. 104. 



Range. — Southern Arizona and Lower California. 



Lower Californian Records. — Cape St. Lucas, Cope, 1860a, p. 343; La Paz, 

 Yarrow, 1882, p. 98; San Jose del Cabo, Sierra San Lazaro, Van Denburgh, 1895, p. 

 155; Santa Rosalia, Mocquard, 1899, p. 330. 



A single specimen, (U. S. N. M. No. 64578), from Miraflores, is in 

 the Albatross collection. Its stomach contains a juvenile specimen of 

 Ctenosaura hemilopha. 



The dorsal scales are 25-21-15; ventral plates, 241; subcaudals, 

 58+. The total length is somewhat more than 800 mm. (tail slightly 

 mutilated) . The loreal is double on one side, single on the other. 



There are three specimens in the collection made by the Biological 

 Survey, one from La Paz (U. S. N. M. No. 37522), and two from Santa 

 Anita (37523-4). 



Micrurus euryxanthus (Kennicott) 



Elaps euryxanthus Kennicott, 1860, p. 337. 



Micrurus euryxanthus Stejneger and Barbour, 1917, p. 106. 



Range. — Southern New Mexico and Arizona, northern Mexico. 



Recorded from Tiburon Island by Streets, 1877, p. 40. 



Crotalus molossus Baird and Girard 



Crotalus molossus Baird and Girard, 1853, p. 10; Stejneger and Barbour, 1917, 

 p. 110. 

 Range. — Southern Texas to Arizona and northern Mexico; San Esteban Island. 



This species does not enter peninsular Lower California. A speci- 

 men secured on San Esteban Island in the Gulf of California by the Alba- 

 tross Expedition (U. S. N. M. No. 64586) is referable to this species in all 

 scale characters, but is exceptionally pale in color, neither the outlines of 

 the rhombs nor the two spots normally enclosed in the rhombs being 

 distinctly marked. This is due chiefly to the paleness of the general 

 coloration. 



The ventral plates number 189, the subcaudals 26, and the dorsal 

 scale formula is 31-27-21. The total length is 476 mm., the tail (exclu- 

 sive of a single rattle) 36 mm. 



