378 On Two new Lizards from South-eastern Arabia. 



Nasals in contact or separate ; nostrils directed upwards. 

 No spiny scales on the sides of the neck. Upper surface of 

 the body covered with smooth, rather small, imbricate scales, 

 with a few slightly enlarged ones intermixed. Scales on the 

 upper surfaces of the limbs perfectly smooth. The scales of 

 the upper surface and sides of the tail generally, with the 

 exception of a limited area on the mesial line of the tail at its 

 root, are carinated and pointed. The scales on the entire 

 under sm'face, from the chin to the vent, and also those of the 

 under surfaces of the limbs, are smooth, but those on the belly 

 are pointed. Fingers and toes are well fringed, especially the 

 outer border of the fourth toe. Tibia rather long, equalling 

 the length of the head and neck ; the hind limb, when laid 

 forwards, extends beyond the snout. Strong gular and lateral 

 cervical folds and a fold along the sides. 



General colour of the upper surface pale yellowish, rather 

 densely covered with brown, yellowish, and salmon-coloured 

 round spots. The upper surfaces of the limbs tending to be 

 barred with brown, and more or less spotted like the trunk ; 

 hands and feet yellowish. Under surface white. The under 

 surface of the tail salmon-coloured in its proximal half, with 

 three or four black bands towards its end. 



millim. millim. 



Total length 76 78 



Length of head 9-6 97 



„ of head and body 37 36'5 



„ of tail 39 41-5 



„ of tibia 12 12 



„ of hind limb 33-6 35 



This species is most closely allied to the P. luteoguttatus, 

 Boulenger, from northern Baluchistan, with the types of which 

 it has been compared. It differs from it, however, in its 

 smaller dorsal scales, and in the scales generally of the head, 

 and upper and under surfaces of the body and limbs being- 

 smooth. It is further distinguished from P. interscapular is , 

 Liehtenstein, by the upper surface of the head having large 

 smooth scales, and by its dorsal region being covered with 

 much larger, and smooth scales, and by the absence of pro- 

 jecting spinose scales on the sides of the neck, and of a fringe 

 on the hinder aspect of the thighs. 



This interesting discovery extends the southward distribu- 

 tion of the genus Ihrynocephalus to within 16 degrees of the 

 equator. Ihe specimens, two in number, were obtained on 

 the plateau of the Hadramut, on Mr. Bent's expedition. 



