ART. 12 EEVISION OF LIZARDS OF GENUS CTENOSAUEA BAILEY 33 



locality label. They are said to have been collected in "Salvador 

 and Guatemala," Such general records are of no real value. Con- 

 sequently I hereby restrict the type locality of similis to Tela, Hon- 

 duras, where the greater number of specimens of this species have 

 been taken. It also has been collected at the following places: In 

 Central America — Belize and Glovers Reef, British Honduras; Ama- 

 pala, Patuca, and San Pedro Sula, Honduras; Panama City, Corozal, 

 and San Miguel Island, Panama; Tu-ives, Bonilla, Oritina, and Esparta, 

 Costa Rica; Corinto, Chinadega, Pol von, Matagalpa, and Coseguina 

 Volcano, Gulf of Fonseca, Nicaragua; Republic of Salvador; Old 

 Providence Island, off Nicaragua; Bocomon, Cuastotoya, and Hacienda 

 California, Guatemala. In Mexico — Progreso, La Vega, Merida, 

 Chichen Itza, Mujeres Island, and Cozumel Island, Yucatan; Puerto 

 Morelos, Quintana Roo Territory; Chiapas, Tonala, Montecrista, 

 Tabasco, Tehuantepec, Oaxaca, and Suchitepequez on the Los Patos 

 River (14 miles from its mouth). 



The specimen from Old Providence is a small female, not more than 

 one-fom'th grown. It is a true similis and was in all probability car- 

 ried to the island from the neighboring mainland by some fishing or 

 turtling schooner. 



Description. — Paris Nos. 01-255, adult male; 2252, adult male, type. 

 M.C.Z. No. 22624, adult female; 22088, adult male; 22625, adult male. 

 U.S.N.M. 56782, adult male; 47565, adult female. Head long, triangu- 

 lar, covered with small hexagonal slightly convex scales and very dis- 

 tinctly marked off from the body. Muzzle narrowed; supra oculars 

 small, being separated from each other by four or five rows of scales; 

 ear opening is almost as large as orbit. No dewlap, but the transverse 

 gular fold is very pronounced; parietal scales slightly smaller than 

 those on muzzle; nostrils large, situated in anterior third of distance 

 between orbit and tip of muzzle; rostral larger than mental; lores flat; 

 13-14 enlarged supralabials; 13-14 enlarged sublabials; dorsal scales 

 much smaller than ventrals, gradually increasing posteriorly in size, 

 and spinousness; well-developed dorsal crest composed of from 60 to 

 92 spinous scales, constricted and pointing slightly backward. Promi- 

 nent dorsal scales begin jlist back of head, on neck, and continue unin- 

 terrupted to base of tail; the continuity of this crest is effected by short 

 lobes in the sacral region of adult males and by compressed scales in 

 females and young. Tail is ringed about on upper half with whorls 

 of strong and very spinous scales, the first and second (and occasion- 

 ally the third) of these whorls of spinous scales being separated from 

 each other by three rows of small flat basal scales; the subsequent 

 whorls of spinous scales up to the first thhd of the tail's length by tvv o 

 88910—28 3 



