100 Lacertidie. 



Upper caudal scales very oblique and diagonally keeled, those at the 

 base nearly as long as broad, usually strongly, sometimes feebly 

 keeled, lower smooth or feebly keeled in the basal j^art of the tail ; 

 one or two series of small scales usually present on the inid-dorsal 

 line of the basal part of the tail ; 24 to 36 scales in the fourth or fifth 

 whorl. 



Gi'eyish above, with a darker reticulation, or with numerous small 

 round whitish dark-edged spots, or with small blackish dots or 

 vermicular lines sometimes forming wavy transverse lines ; lower parts 

 white, the throat sometimes bluish grey ; tail often with a lateral 

 series of blackish spots. Some specimens of a yellowish -grey sand- 

 colour with the markings very indistinct. Young grey above, with 

 numerous round white spots, and two white streaks along each side of 

 the body and a dark streak along each side of the tail, which is ])luish 

 at the end. 



Measurements (in millimetres) : 



In 



Habitat. — Long known from Egypt, the Siuaitic Peninsula and 

 Palestine, this form has recently been discovered by Dr. C. Chz-isty in 

 Mesopotamia at Basra and by Dr. E. Hartert in the Algerian Sahara, 

 at In Salah, the southernmost point at which zoological collections 

 have been made. 



Var. LONCIIPES, Boulenger. 



A form remarkable for its long and slender hind limbs and its very 

 small scales occurs in the interior of the Algerian Sahara along with 

 the var. inoniafus. 



Head as in the typical form. Hind linili (males) reaching the eye 

 or between the ear and the eye ; foot lA to 1} times as long as the 

 head, fourth toe 14 to 1-^ times. First supraocular entire in the three 

 specimens from Wargla and in the one from El Wed, with one or two 



