242 IGTTANIB^. 



Tapaya orbicularis, Girard, U. S. Explor. Exped., Herp. p. 395 ; 

 Bocourt, Miss. Sc. Mex., Mept. p. 221, pi. xi. tig. 1. 



Head (spines not included) as broad as long or broader than long ; 

 nostril pierced in the line of the canthus rostralis ; tympanum 

 naked ; the head-spines of moderate size, nearly horizontal or 

 obliquely turned upwards ; there are on each side a low post- 

 orbital, an occipital, and three temporals ; the occipitals are the 

 largest, and their extremities on a line with or beyond the line of 

 the longest temporal ; the length of the occipital spines equals about 

 the diameter of the eye. Lower labials terminating in a series of 

 three or four large, compressed, pointed scales ; a series of enlarged 

 scales, as large as or a little larger than, and parallel with, the 

 lower labials ; gular scales equal, smooth ; gular fold very strong, 

 forming a deep pouch on each side of the neck, which bears two 

 short parallel longitudinal series of erect spines. Back and hind 

 limbs with scattered large spiuose keeled scales, which are longer 

 than broad and obliquely directed upwards and backwards ; a regular 

 lateral series of spines ; pectoral and ventral scales perfectly smooth. 

 Fifteen to twenty-one femoral pores on each side in the male, 

 ten to eighteen in the female, the series sometimes meeting in the 

 middle. Male with enlarged postanal scales. Tail twice to thrice 

 as long as the head. Brownish, j-ellowish, or reddish above, with 

 one or two series of large blackish spots on each side of the back ; 

 these spots sometimes pale-bordered posteriorly ; a large black spot 

 on each side of the nape is constant ; lower surfaces yellowish white, 

 spotted or marked with black. 



millim. millim. 



Total length 135 Fore limb 37 



Head 20 Hind limb 49 



Width of head .... 21 Tail 53 



Body Q2 



Mexico. 



a-c. J 5. City of Mexico. Mr. Doorman [C.]. 



d. S. Plateau of Mexico, 7500ft. P. Geddes, Esq. [P.]. 



e-y. S' Ciudad. Hr. Forrer [C. |. 



h-i. 2 & bgr. Mexico. J. E. Harting, Esq. [P.]. 



k-l. 5 & hgr. Mexico. Mr. Geale [C.]. 



m. Ad., stuifed. Mexico. W. Ogilby, Esq. [F.]. 



Var. cortezii. 



Phrynosoma orbiculare, Wiegm. Herp. Mex. pi. viii. f. 1. 

 Tapaya cortezii, Bocourt, Miss. Sc. Mex., Rept. pi. xi. fig. 2. 

 orbicularis, var. A, Bocourt, I. c. p. 223. 



The occipital spines are not longer than, and do not extend 

 posteriorly quite as tar as, the longest temporals. Head much 

 broader than long. 



a-h. S • Piiebla 



b. $ . Orizaba. 



c. 5. Jalapa. Mr. Hoege [C.]. 



