180 Lacertidiv. 



Head-sliielcls normal, but occipital sometimes absent. 

 Nostril pierced between an npper and a lower nasal and 

 a postnasal. Lower eyelid scaly. C'ollar absent ; a 

 short fold in front of the arm. Back covered with large 

 rhombic or lanceolate, strongly keeled and imbricate 

 scales ; ventral plates smooth, imbricate. Digits feebly 

 compressed, with shari)ly keeled laniellte inferiorly. 

 Femoral pores. Tail long, cylindrical. 



Tropical and South Africa. 



The parietal forameu aud pterygoid teeth are present. 



This genus may be regarded as derived from Trovidosanra, differing 

 only in the keeled subdigital lamellse combined with the presence of a 

 subnasal separating the nasal from the first upper labial ; but it must 

 be borne in mind that the latter difference is no greater than between 

 species united in the same genus under Cahrita and Opltiops. 



Synopsis of the Species. 



Frontonasal single ; subocular usually bordering the mouth ; 

 occipital visu.ally i:iresent ; 34 to 40 scales and. plates rovind 

 middle of body; 8 to 13 (rarely 15) femoral j^ores on each 

 side. 



A. A single anterior loreal. 



Upper head-shields rather feebly striated ; prefrontal in contact 

 with the anterior of the two large supraoculars, which are in 

 contact with supei'ciliaries ; hind limb reaching a little beyond 

 the shoulder in males ..... I. tanganicana, Hlgr., i:>. 181. 



Upper head- shields strongly striated and keeled ; pi-efrontal 

 visually in contact with the anterior of the two large suj)ra- 

 oculars, which are separated from the superciliaries by small 

 scales ; hind limb reaching- axil or shoulder in males. 



/. hivittata, Bocage, p. 182. 



Upper head-shields strongly striated ; prefrontal not reaching 

 the anterior of the two large supraoculars, which is as long- 

 as or a little shorter than its distance from the second 

 loreal ; a series of small scales between supraoculars and 

 suijerciliaries ; hind limV) reaching between shoulder and ear 

 in males ........ 7. capensis, A. Smith, p. 185. 



Upper head-shields strongly striated ; prefrontal not reaching 

 the anterior of the two large supraoculars, which is longer 

 than its distance from the second loreal ; a series of small 

 scales between supraoculars aud superciliaries ; hind limb 

 reaching ear or between ear and eye in males I. longipes, Blgr., p. 188. 



