682 Bulletin American Museum of Natural History [Vol. XLVI 



In addition to the generally light coloration mentioned in the original 

 description, the absence of the two white lines on the posterior and supe- 

 rior aspect of the hind leg, which are very distinct in sericea, appears to 

 be the most important distinctive character. 



Verticaria picta Van Denburgh and Slevin 

 Verticaria picta Van Denburgh and Slevin, 19216, p. 98. 



Range. — Confined to Monserrate Island, Gulf of California. 



The relations of this newly discovered form with those of the Lower 

 Calif ornian peninsula are unknown, the preliminary diagnosis only being 

 at present available. 



Key to the Peninsular Species of Verticaria 



1. A single mid-dorsal line, forked anteriorly V. hyperythra schmidti. 



A pair of sharply defined dorsal lines, sometimes with a faint line between them . 2. 



2. Second supraocular usually in contact with the frontal . . . . V. h. hyperythra. 

 Second supraocular usually separated from the frontal by a row of granules. 



V. h. beldingi. 



Plestiodon skiltonianus Baird and Girard 

 Plestiodon skiltonianum Baird and Girard, 18526, p. 349, PI. iv, figs. 4-6. 

 Plestiodon skiltonianus Stejneger and Barbour, 1917, p. 71. 



Range. — British Columbia to Lower California. 



Lower Californian Records. — Cape St. Lucas, Yarrow, 1882, p. 41; San 

 Francisquito, Sierra Laguna, Van Denburgh, 1895, p. 134; Los Coronados Islands, 

 Van Denburgh, 1905, p. 18. 



A specimen in the Biological Survey collection comes from Todos 

 Santos Island, opposite Ensenada, (U. S. N. M. No. 37686). 



The P. lagunensis described by Van Denburgh from the Sierra 

 Laguna (loc. cit.) is not recognized by Stejneger and Barbour. It does not 

 appear to me to warrant specific separation. Mr. Charles L. Camp in- 

 forms me that the salmon-colored tail, one of the characters on which 

 lagunensis was based, is common in skiltonianus in California. 



Bipes biporus (Cope) 

 Euchirotes biporus Cope, 1894a, p. 436, figs. ba-e. 

 Bipes biporus Stejneger and Barbour, 1917, p. 72. 



Range. — Southern Lower California. 



Lower Californian Records. — La Paz, Streets, 1877, p. 37. 



Serpentes 

 Siagonodon humilis (Baird and Girard) 

 Rena humilis Baird and Girard, 1853, p. 143. 

 Siagonodon humilis Stejneger and Barbour, 1917, p. 73. 



