AMEIVA.—CNEMIDOPHORUS. 25 
[Ameiva edracantha, Bocourt (Ann. Sc. Nat. 1873, xix. art. 4; Miss. Sc. Mex., 
Rept. p. 263, t. 204. fig. 6), founded on a specimen in the Paris Museum which is 
said to have been brought from Mexico, occurs, in fact, near Guyaquil, where two 
specimens were collected by Fraser. This species, therefore, is extralimital, and I 
may mention on this occasion that the spinous lateral preeanal scales are a sexual 
character, the female having flat preanals of the usual form. | 
CNEMIDOPHORUS. 
Cnemidophorus, Duméril & Bibron, Erp. Gén. v. p. 123. 
While the Ameivas rarely leave the interior of woods, and are never seen in barren 
places, the Mexican species of Cnemidophorus are generally found in open and sunny 
spots, on the sandy banks of rivers, or among clear thickets (Sumichrast). 
1. Cnemidophorus sex-lineatus*. 
Lacerta sex-lineata, Linn. Syst. Nat. ed. 12,1. p. 864; Harlan, Journ. Ac. Nat. Sc, Philad. vi. 1827, 
p. 18. 
Ameiva sex-lineata, Holbrook, N.-Amer. Herpet. 1836, p. 63, t. 6, and 2nd edit. 1842, p. 109, t. 15. 
Cnemidophorus sex-lineatus, Dum. & Bibr. v. p. 181; Gray, Lizards, p. 21; Cope, Proc. Ac. N. Se. 
Philad. 1866, p. 8303; Bocourt, Miss. Sc. Mex., Rept. p. 273, t. 20c. fig. 11. 
Cnemidophorus gularis, Baird & Gir. Proc. Ac. N. Sc. Philad. 1852, p. 128; and U.S. Mex. Bound. 
Surv., Rept. t. 34. figg. 1-6. 
Cnemidophorus perplexus, Baird & Gir. Proc. Ac. N. Sc. Philad. 1852, p. 128. 
Cnemidophorus mexicanus, Peters, Berl. MB. 1869, p. 62 t. 
Cnemidophorus communis, Cope, Proc. Am. Phil. Soc. xvi. 1877, p. 95. 
Cnemidophorus angusticeps, Cope, |. c. 
Hab. Norma America, Southern United States—Mexico, Presidio (forrer), Colima 
(Bocourt), Matamoras (U. S. Nat. Mus.), Guadalaxara, Cordova, and Yucatan 
(Cope); GuateMALa, Coban (Cope). 
Abdominal scutes in eight longitudinal series; scales in the middle of the throat 
somewhat enlarged, and gradually passing into the smaller lateral scales. A marginal 
* Bocourt includes in the synonymy of this species a number of other names which have been created by 
American authors on very slight grounds. I fully agree with him as to their value, but it will be difficult to 
determine to which species they should be referred. From the character of the descriptions and figures I regard 
the task as impossible, the more so as it appears from Yarrow’s ‘ Check-list of N orth-American Reptilia in the 
U.S. National Museum,’ that the majority of the types of Baird’s and Girard’s species have not been preserved, 
+ Having some doubts as to the propriety of including this among the synonyms of C. sev-lineatus, I asked 
Prof. von Martens for information ; and from his report it appears not only that the specimens of C. mexicanus 
are identical with those in the British Museum which were collected by Herr Forrer at Presidio, but also that 
Peters himself left a note on the bottle containing them that they were not distinct from C. gularis (B. & G.) 
BIOL, CENTR.-AMER., Rept., August 1885. #4 
