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Genus CNEMIDOPIIORUS, Witeler. 



Cnemidophorus, Wagler, 1880, 75, 154; Boulenger, 1885, S9, ii, 360. 



Body terete, head pyraiuidal, tail loug and slender. Limbs well de- 

 veloped, with five digits each. Head with large shields. The anterior 

 nasals meeting in the middle line. Eyelids present. Tympanum ex- 

 posed, sunken below the surface. Lateral teeth bicuspid or tricuspid. 

 Scales of t]\e upper surface of the body small ; those of the abdomen 

 large, and arranged in 8 to 12 longitudinal rows. A double fold of skin 

 on front of neck. Femoral pores present. 



About 16 species are known. 



Cnemidophorus sex-lineatus, (Linn.). 

 Six-lined Lizard. 



Lacerta sexlineata, Linnaeus, 1766. 64, ^^^- ^'i? h 364; Ameiva sexlineafa, 

 Holbrook, 1842, 54-, ii, 100, pi. '15; Cnemidophorus sex-lineatus, Boulenger 

 1885, 29, ii, 364. 



Long and slender. Head a four-sided pyramid. A large vertical 

 plate, on each side of which, over the eyes, are four supraoculars. Nos- 

 tril in the anterior nasal. Ear about the size of the eye. ±\- few ptery- 

 goid teeth present. Gular folds two, the posterior with large scales in 

 front. Upper surface of the fore limbs with large scales. Front of 

 thigh and under surface of the lower leg with enlarged scales. Scales of 

 the upper surface of the body small ; those of the abdomen large, 

 squarish ; and arranged in 8 longitudinal, and about 33 transverse rows. 

 Tail with large, squarish, keeled scales, the keel running somewhat ob- 

 liquely. Vent with three enlarged scales in front. Appressed hind limb 

 reaching to the ear. Tail nearly twice the length of the head and body ; 

 sometimes more. 



The color of the back is olive or brownish, in life green. The sides 

 are black, with three narrow stripes of yellow. A greenish stripe on the 

 back of the thigh, prolonged on the sides of the tail. 



Toial length about 10 inches. Distributed from Maryland to Kansas, 

 Southern California, and Mexico. 



This species is included in the fauna of Indiana on the testimony of 

 Mr. Robert Ridgway of the National Museum. He writes me that while 

 he was collecting snakes at Monteur's Pond, near Wheatland, Knox 

 county, he climbed a buttonbush to snare a big water-snake. While 

 maneuvering to get his noose-rod into position he saw a specimen of 

 what he is positive was this species (with the appearance of which he was 

 previously very familiar) basking in the sun on a branch of the same bush. 

 Before he could secure the lizard, it jumped off into the water and swam 

 away. There is nothing, whatever, improbable about the occurrence of 



