12. SCELOPORUS 295 



Habits. — This species usually is seen on the ground and 

 retreats to holes in earth banks or spaces under or between 

 stones. Occasionally it resorts to trees. Ruthven found 

 that specimens captured in New Mexico had eaten ants, 

 beetles, and a robber fly. 



59. Sceloporus elongatus Stejneger 



Stejneger^s Blue-bellied Lizard 



Plate 22 



Sceloporus elongatus Stejneger, North Amer. Fauna, No. 3, 1890, p. 

 Ill (type locality, Moa Ave, Painted Desert, Arizona); Bou 

 LENGER, Proc. Zool. Soc. London, 1897, p. 506; Carv, N. Amer. 

 Fauna, No. 23> 191 1) PP- 26, 39; V.<n Denburgh & Slevin, Proc. 

 Cal. Acad. Sci., Ser. 4, Vol. 5, No. 4, 1915, p. 104; Stejneger & 

 Barbour, Check List N. Amer. Amph. Rept. 1917, p. 54. 



Sceloporus undulatus Elrod, The Museum, Vol. I, 1895, p. 137; Cope, 

 Report U. S. Nat. Mus. for 1898, 1900, pp. 368, 373 (part); CocK- 

 erell, Univ. Colorado Studies, Vol. VII, 1910, p. 131. 



Description. — Head and body considerably depressed. 

 Nostril opening nearer to end of snout than to orbit. Upper 

 head-shields smooth, moderately large, and slightly con- 

 vexj interparietal much largest. Frontal usually divided 

 transversely. Parietal, frontoparietal, and frontal plates 

 separated from enlarged supraoculars by a series of small 

 plates or granules. Superciliaries long and strongly imbri- 

 cate. Middle subocular very long, narrow, and strongly 

 keeled. Rostral plate of moderate height, but great width. 

 Labials long, low, and nearly rectangular. Below lower 

 labials and behind large pentangular symphyseal, a series 

 of plates larger than gulars. Latter smooth, imbricate, 

 and sometimes emarginate posteriorly. Ear-opening large, 

 slightly oblique, with an anterior denticulation of smooth, 

 acuminate scales. Scales on back equal-sized, keeled, pointed, 

 and arranged in nearly parallel longitudinal rows. Scales 



