1922] Sch?nidt, Amphibians and Reptiles of Lower California 689 



PituopMs vertebralis (Blainville) 

 Coluber vertebralis Blainville, 1835, p. 293, PI. xxvn, figs. 2-25. 

 Pituophis vertebralis Stejneger and Barbour, 1917, p. 86. 



Range. — Southern and central Lower California. 



Lower Californian Records. — Cape St. Lucas, Cope, 1860a, p. 342; La Paz, 

 Yarrow, 1S82, p. 107; San Jos6 del Cabo, Miraflores, Van Denburgh, 1895, p. 150; 

 San Ignacio, Arroyo de Santa Agueda, Mocquard, 1899, p. 320; Ballenas Bay, Cope, 

 1900, p. 879; San Pedro, San Antonio, San Bartolo, Agua Caliente, Van Denburgh 

 and Slevin, 1921a p. 67. 



Four specimens (A. M. N. H. Nos. 5588-90, U. S. N. M. No. 64583) 

 collected at Miraflores are in the Albatross collection. The lengths range 

 from 965 to 1665 mm.; the tail-length from 118 mm. to 220 mm. The 

 tail-length/total length ranges from .13 to .15 in the three male speci- 

 mens, .12 in the single female. In scale characters, these specimens fall 

 within the range of variation of the four specimens recorded by Van 

 Denburgh and Slevin (loc. cit.). 



Specimens in the Biological Survey collection come from Santa 

 Margarita Island (U. S. N. M. No. 37537), Cape San Lucas (37538), 

 San Jose" del Cabo (37539), and Santa Anita (37540). 



Key to the Species of Pituophis in Lower California 1 



1. Coloration on anterior half of body largely red; upper labials usually 9 or 10; 



scales usually in 33 or 35 rows P. vertebralis. 



Coloration anteriorly not reddish; upper labials usually 8; scale rows usually 

 less than 35 2. 



2. Dorsal blotches numerous, 54 to 89 on body, 14-29 on tail. 



P catenifer annectens. 

 Dorsal blotches fewer, 32-55 on body, 8-14 on tail P.c . rutilus. 



Diadophis amabilis Baird and Girard 



Diadophis amabilis Baird and Girard, 1853, p. 113; Stejneger and Barbour, 

 1917, p. 75. 

 Range. — Oregon to Lower California, west of the desert divides in California. 



The specimen in the Biological Survey collection, U. S. N. M. No. 

 37526, from San Matias Pass, in the San Pedro Martir Mountains, estab- 

 lished this species in the fauna of Lower California. 



The specimen measures 503 mm., tail-length, 86 mm. The dorsal 

 scales are 15-15-14; the ventral plates, 203; the subcaudals, 60; pre- 

 oculars, 2-2; postoculars, 2-2; temporals, 1-1, 1-1; upper labials, 7-8; 

 lower labials, 8-8. 



The ventral color includes the first lateral scale row; the small dark 

 ventral spots are irregularly disposed, but are on the posterior margins 

 of the ventral plates. 



l After Van Denburgh, 1920, p. 12. 



