Hurler — Herpetology of Missouri. 139 



Genus cnemidophorus. 



With two subgular folds. Tongue with no sheath, free behind. Max- 

 illary teeth compressed, the posterior teeth tri-cuspid. Femoral pores 

 present. Scales granulate above, transversely elongate and quadrangular 

 on the belly. Digits 5-5. (Garman.) 



40. Cnemidophorus sexlineatus Linn. Swift. Six-lined 

 Lizard. 



Lacerta sexUneata, Ameiva sexlineata, Lacertus griseus. 



Description. — Head rather small, compressed in front of the eyes 

 and pointed. Rostral produced backwards and acutely angled between 

 the nasals, which are large and touch on the middle line. A large 

 frontal; on each side of which, over the eye, are four supraoculars, the 

 two middle ones the largest. One loral on each side. Five or six supra- 

 parietals, which are followed posteriorly by three plates of nearly the 

 same size. Two series of plates on the lower jaw, the inferior and the 

 largest consisting of five plates, the two anterior ones being in contact 

 with each other. Ear-opening vertical, oblong, exposing the tympanum. 

 Gular folds two, the posterior v/ith large scales in front. 



Upper surface of the lower limbs with large scales. Front of thighs 

 and under surface of the legs with enlarged scales. Scales of the 

 upper surface of the body small, those of the belly large and rectangu- 

 lar, arranged in eight longitudinal rows, with about 33 to 36 trans- 

 verse rows. Vent with three enlarged scales in front. Femora with a 

 ridge bearing sixteen pores. Tail round, covered with large, verticil- 

 lated, carinated scales above, smooth underneath. 



Color. — Color above brownish gray, with three narrow yellow longi- 

 tudinal lines on each side with black spaces between them. Head brown 

 or blue-gray. Legs brown. Under parts bluish white. 



Size. — Length of head and body to vent 80 mm.; tail beyond vent 146 

 mm.; total length 226 mm. 



Habitat. — Eastern North America from Maryland to 

 Florida, west to Nebraska, sonth to Texas. Missouri lo- 

 calities: St. Louis, Jetferson, Taney, Stone, Jackson, 

 Johnson, Randolph, Warren and Pike Counties. 



Habits. — This lizard runs with great swiftness. It can 

 hardly be followed with the eye, and is, therefore, very 

 difficult to secure. The best way is to shoot it with fine 

 shot. Early in the morning, when under rocks and not 

 yet thoroughly warmed, it is easily captured. It never 

 resorts to trees, but trusts to its swiftness and skill in 



