Lizards from South-eastern Arabia. 377 



hind limb, there are some very large keeled and spiny or 

 conical scales. The limbs are of moderate length, but the 

 hind limb does not quite reach to the axilla. The tail is 

 much flattened above, and its broadest part is as broad as the 

 head, while its length equals that of the body and one half of 

 the head ; it has 24 (or may be more or less) well-defined 

 annuli, each furnished witii from 10 to 12 spines, strongest 

 and longest on the external border. On the sides of the neck 

 and on the throat the skin is loose and thrown into folds. 



The male is olive-grey above, covered with numerous dark 

 brown lines, irregular in form and distribution, many tending 

 to define round spots or ocelli of the general colour. On the 

 head, but especially on its sides, the lines are more strongly 

 marked and deep bluish black. The belly and upper surfaces 

 of the limbs are greenish yellow, but the chin, throat, and 

 chest are yellowish, broadly marbled with deep bluish black; 

 and the greater part of the belly and under surfaces of limbs 

 are marked with similarly coloured blotches. The tail above 

 is uniform yellowish brown, and its under surface pale yel- 

 lowish. 



The females are much paler than the males and generally 

 olive-grey, but the markings of the upper surface, in some, are 

 reduced to fine dark brown spots, without any trace of lines or 

 ocelli. The underparts are pale yellowish, with a few dark 

 spots on the throat. The tail is pale yellowish brown, and 

 in some the spines are marked with dark brown. 



6. 2- 



milliiu. millim. 



Total length 330 310 



Head 33 31 



Width of liead 37 33 



Body and head 177 109 



This species is distinguished from the other two members 

 of the genus by its long tapering tail, by its scales^ and also 

 by its denticulated ear. 



Six examples of this handsome lizard, three males and 

 three females, were captured on Mr. Bent's expedition to the 

 Hadramut by my collector, who, owing to the courtesy of 

 Mr. Bent, was permitted to accompany him throughout his 

 journey. They were obtained near Makulla, below the 

 plateau. 



Phrynocephalus arahicus, sp. n. 



Head flat and rounded ; forehead convex. Scales on the 

 upper surface of the head moderately large, flattened, smooth, 

 and tessellate, but slightly imbricate on the temporal region. 



