208 Lacertidie. 



coi'uer of tlie eye and tlie tympanum, its length 3^ to 4 times in 

 lengtli to vent in males, 3f to 4i times in females ; snout obtusely 

 pointed, with sharp canthus and concave loreal region, as long as the 

 postocular part of the head ; a lanceolate concavity on the upper 

 surface of the snout, extending on the frontal shield ; a sharp keel 

 below the eye, on the freno-ocular and subocular shields. Pileus 2 to 

 2^ times as long as broad Neck as broad as tlie head. The hind 

 limb reaches the ear or between the shoulder and the ear in males, the 

 elbow, the axil, or the shoulder in females ; foot 1-J^ to li times as 

 long as the head ; digits feebly compressed. Tail li to 2\ times as 

 long as head and body. 



Upper head-shields smooth ; nostril pierced between 2, 3, or 4 

 shields * ; nasals usually forming a short suture behind the rostral, 

 rarely narrowly separated t ; frontonasal broader than long ; pre- 

 frontals as long as broad or a little longer than broad, forming an 

 extensive median suture ; frontal li to 2 times as long as broad, as 

 long as or a little longer than its distance from the end of the snout, 

 much narrower behind than in front, the lateral borders concave ; 

 parietals a little longer than broad : interparietal small or very small, 

 often followed by a second small shield + ; occipital very small and 

 widely separated from the interparietal, or absent. 4 supraoculars, 

 first small and usually in contact with the frontal, second longer than 

 the third, fourth small but usually larger than the first ; 4 super- 

 ciliaries, rarely 5, second much longer than the others, all in contact 

 with the supraoculars ; sometimes 1, 2, or 3 granules between them § ; 

 Two superposed postnasals, rarely one ; anterior loreal shorter than 

 the second ; 4 |J upper labials anterior to the subocular, which is much 

 narrower beneath than above and borders the mouth. Two large 

 upper, temporals, anterior the longer and usually in contact with the 

 fourth supraocular ; temporal scales small, smooth or feebly keeled ; 

 a large, opercle-like tympanic shield.^[ 



6, rarely 5,** pairs of chin-shields, the 3, rarely 2, anterior iu contact 

 in the middle ; gular scales largt^, flat, imbricate towards the collar, 

 which is very indistinct, except at the sides, and composed of 6 to 10 



* Between two shields, followed by two superposed postnasals, in 14 specimens ; 

 between four shields (two nasals and two postnasals) in 22; between three 

 (there being only one postnasal) in 3. 



t Male from Tafrent, male from Tunis (Paris JIuseum). 



X Which is rarely in contact with the occipital. 



§ 5-3 in a male from Batna ; 4-6 in a female from Tunis (Paris Museum). 



[| Exceptionally 5, according to Doumergue. 



^ Divided into two in a male from Batna. 



** Female from Portes-defer. .5-(3 in a male from Tunis (Paris JIuseum). 



