376 Dr. J. Anderson on Two new 



anterior border of the orbit ; digital expansions well deve- 

 loped ; 2H U^nielia^. under plialanges II and III of the fourth 

 toe. Tail compressed, with a serrated crest of strong-ly en- 

 larged keeled scales. Male with enlarged postanal scales. 

 OHve above, with the vertebral line lighter j some blackish 

 lonti'itudinal lines on the throat. 



millim, milliin. 



Total length (tail reproduced) 80 62 



Head lo 13 



Width of head 8 7 



Body 32 31 



Fore limb 21 19 



Hind limb 30 34 



Tibia 11 10 



Apparentl}' nearest allied to A. Krugi^ Peters, from Porto 

 Hico, but distinguished bj the smaller occipital scale. 



XLVIII. — On Tioo neic Species of Agamoid Lizards from the 

 Hadramut^ South-eastern Arabia. By JoHN ANDERSON, 

 M.D., F.R.S. 



Aporoscelis Benti^ sp. n. 



Head moderately large, curved downwards and forwards 

 from the vertex to the labial margin ; clieeks of tlie male 

 much swollen, those of the female hardly perceptibly so ; 

 snout very short, moderately pointed ; canthus rostralis absent ; 

 nostrils directed forwards and outwards ; ear a high vertical 

 slit, its anterior border with a dentate margin of four or more 

 strong triangular scales. The scales on the upper surface of 

 the head and on the cheeks are smooth, irregular in size, and 

 tessellated in arrangement, except on the occipital region, 

 where they are slightly imbricate, and a few tending to be 

 keeled ; a line of enlarged scales below the eye ; labials very 

 small. The scales on the upper surface of the body are rather 

 small, juxtaposed, faintly imbricate, and perfectly smooth ; on 

 the nape and on the sides they are smaller than on the back, 

 but on the sides they become enlarged as they a])proach 

 the ventrals ; ventrals more or less subquadrangular and 

 arranged in transverse lines, but less so on the chest ; the 

 scales on the throat are the smallest on the body, and as they 

 ajjproach the chest become almost granular. On the upper 

 surfaces of the limbs the scales are enlarged, most so on the 

 hind limbs, and are smooth, but, on the tibial portion of the 



