1897.] 



LIZAEDS OF THE GENUS SOELOPOEUS. 



51 y 



Caudal scales as large as or a little larger than dorsals, strongly 

 keeled, shortly mucronate. Males with enlarged postanal scales. 



(1) Types of 8. teapensis. 



This table shows such approximation to S. variabilis in the 

 number of scales as to render it probable that a larger series would 

 completely bridge over the gap now believed to exist between the 

 two species, in which case they would have to be united. 



Coloration exactly as in S. variabilis, the ground-colour of the 

 upper parts varying from pale golden to dark bronzy olive, with 

 more or less distinct lighter lateral bands ; a black spot with an 

 oblique white streak above the shoulder. 



Bab. This species, which has been erroneously referred to the 

 synonymy of S. clirysostictus by Cope, is only known from the 

 States of Oaxaca, whence the type specimens were obtained ^, and 

 Tabasco. 



28. SCELOPOETJS SIN-IFBRTJS. 



Sceloporus siniferus, Cope, Proc. Am. Philos. Soc. xi. 1869, 

 p. 1.57 ; Bocourt, Journ. de Zool. v, 1876, p. 342 : Cope, Proc. 

 Am. Philos. Soc. xxii. 1885, p. 394 ; Bouleng. Cat. Liz. ii. p. 237 

 (1885) ; G-iinth. Biol. C.-Am., Eept. p. 76 (1890). 



Scelojyorus humeralis, Bocoui't, Miss. Sc. Mex., Eept. p. 206, 

 pi. xviii. bis, fig. 3 (1874). 



Head-shields keeled or striated, rarely nearly smooth ; frontal 

 transversely divided, the anterior or both the anterior and posterior 

 portions longitudinally bisected, separated from the interparietal 

 by a pair of frontoparietals ; interparietal broader than long, 

 usually followed by a band-like shield ; parietals small or broken 

 up into scales ; four or five large transverse supraoculars, bordered 

 inwards by a complete or incomplete series of scales and separated 



1 The agreement between our female specimens from Oaxaca and the type 

 female, vthich was likewise obtained together with S. siniferus, is so close that 

 I cannot entertain the least doubt as to the correctness of my identification. 

 But it must be mentioned that Bocourt describes the male as without sexual 

 markings, whilst our specimens have the belly coloured as in S. variabilis. I 

 have, however, examined a male of the latter species (from H. del Bobo) in 

 which the ventral markings are very indistinct. 



