466 MR. W. T. BLANFORD ON THE [Apr. 5, 



to the end of the third toe is less than the distance from the ear- 

 opening to the end of the snout, whilst the two measurements are 

 identical in P. rupestris. The proportions of the limbs to the body, 

 however, in the British-Museum specimens of P. Jlavipunctatus 

 agree with those assigned to the species by Peters. 



The following measurements show, in parts of a metre, the dif- 

 ferences iu these species. The dimensions of P. longipes are those 

 given by Peters ; those of P. rupestris are from one of the largest 

 Socotran specimens ; those of P. Jlavipunctatus, from one of the 

 specimens received from Riippell. 



P. Jon- P. rupes- P. flavi- 

 gipes. iris. punctatus. 



Head and body, from nose to anus ... 0040 0030 0-032 



Head alone O-0C9 0009 0-009 



Foreleg 0021 O'Olo 0013 



Fore foot, to end of third finger 0007 005 0-004 



Hind leg 0030 0020 00175 



Hind foot, to end of third toe 0012 0008 0065 



The specimens of P. rupestris, from Socotra, have for the most 

 part a broad rufous band down the middle of the back. The sides 

 of the back and the flanks are dark brown, spotted or striped with 

 very light brown ; there are one or two pale bands down the sides, 

 and one conspicuous pale stripe below the eye, from the lower la- 

 bials. The lower parts of the flanks and the sides of the belly have 

 small brick-red spots dotted over them. This coloration differs in no 

 important particular from that of Muscat and Persian-Gulf specimens. 



Pristurus insignis, sp. nov. (Plate XLII. fig. 1.) 



P. major, gracilis, squamis miniinis undique indutus; cauda compressa 



sed crista carente ; pede posteriore antics adducto ante aurem 



jungcnte, anteriore ante extremitatem rostri. Long, tota 0'147 



met., caudce 0-095, capitis Q'QIA, pedis posterioris ab inguine 



0-038. 



Much larger than the other species of the genus, and without 



any enlarged or spinose scales along the upper edge of the tail, which 



is elongate, attenuate, and compressed, as in the other forms. 



General form very slender ; limbs and toes long, the fore limb laid 



back extends to the groin, and laid forwards extends beyond the 



snout by the length of the hand, the hind limb laid forwards reaches 



to beyond the ear. 



Scales of the back and sides minute, granular, those of the belly 

 scarcely larger, but less convex. Tail-scales larger than those of 

 the back, and becoming imbricate behind ; the upper edge of the 

 tail sharply compressed, but without any enlarged scales, lower edge 

 rounded, with a row of larger smooth imbricate subcaudals, the 

 scales on each side of the subcaudals forming a passage in size into 

 the ordinary tail-scales. Scales above the limbs like those on the 

 back, those beneath the forearm and tarsus larger. Beneath the 

 feet, the scales of the soles are small and granular, with the ex- 

 ception of rows of larger scales from the first and fifth fingers to the 

 wrist, and from the first toe to the heel. The fingers and toes are 



