ZooL.— Vol. IV] VAN DENBURGH— COAST ISLAND REPTILES 9 



2. Sceloporus becki sp. nov. 



Plate IV. 



The Sceloporus of the mainland at Santa Barbara is the 

 ordinary ^. occidentalis; that is to say, it is the smaller form 

 with a complete series of scales between the large supra- 

 oculars and the median head plates, with from thirty-five to 

 forty-six dorsal scales between the interparietal plate and the 

 back of the thighs, with keeled scales on the back of the 

 thigh, and with two blue patches on the throat. Five 

 specimens from San Miguel Island resemble this species 

 closely in size, but are more nearly like S. biseriatus in 

 coloration, and differ from both in the possession of certain 

 characters most unusual in a member of the ^. undulatus 

 group. I take pleasure in naming this island form in honor 

 of Mr. R. H. Beck, who collected the specimens. 



Diagnosis. — Frontal and parietal plates separated from enlarged supra- 

 oculars by a series of small scales or granules; frontoparietal plate in contact 

 with enlarged supraoculars; scales on back of thigh smaller than those in 

 front of anus; 43-48 dorsals between interparietal and back of thighs; scales 

 on back of thigh keeled; whole throat and chin blue crossed by diagonal 

 black lines which unite posteriorly with a large black patch extending across 

 throat from shoulder to shoulder. 



7>/^.— Adult male, Cal. Acad. Sci. No. 4537, San Miguel Island, Cali- 

 fornia, R. H. Beck, March 26, 1903. 



Description. — Head and body little depressed; nostril opening much 

 nearer to end of snout than to orbit; upper head shields smooth, moderately 

 large and slightly convex, interparietal largest; frontal divided transversely; 

 parietal and frontal plates separated from enlarged supraoculars by a series 

 of small plates or granules; frontoparietal in contact with enlarged supra- 

 oculars; superciliaries long and strongly imbricate; middle subocular very 

 long, narrow and strongly keeled; rostral plate of moderate height but great 

 width; labials long, low and nearly rectangular; symphyseal large and 

 pentangular; some series of enlarged sublabials; gulars smooth, imbricate, 

 often emarginate posteriorly; ear-opening large, slightly oblique, with 

 anterior denticulation of smooth acuminate scales; scales on back equal- 

 sized, keeled, mucronate with slight denticulation, and arranged in nearly 

 parallel longitudinal rows; lateral scales smaller and directed obliquely 

 upward; upper and anterior surfaces of limbs with strongly keeled and 

 mucronate scales; posterior surface of thigh with small, acuminate, keeled 

 scales; ventral scales much smaller than dorsals, smooth, imbricate, and 

 usually bicuspid; tail furnished with slightly irregular whorls of strongly 

 keeled and pointed scales which are much larger and rougher above than 

 below, where they are smooth proximally; femoral pores 14-16; 9-12 dorsal 

 scales equaling length of shielded part of head; number of scales in a row 



