AKT. 12 REVISION OF LIZARDS OF GENUS CTENOSAURA BAILEY 



29 



Coloration. — General color of head and body blackish brown, being 

 crossed on back between sacral and postscapular regions by five 

 yellow, marks, which are bands posteriorly but become spots anteri- 

 orly. These bands are more pronounced in females. Sides of neck 

 yellow, contrasting strongly with black of throat and nape. This yel- 

 low space is practically divided by a black line, which extends poste- 

 riorly from angle of lower jaw. Under parts are yellowish, streaked 

 slightly with waves of blackish-brown spots; a yellow stripe beginning 

 at posterior border of tympanum extends caudad over shoulder, fading 

 out slightly above and caudad to axilla of arm. Limbs are blackish, 

 and on fore arms are numerous yellow scales; digits and tail are 

 annulated with blackish-brown and yellow rings of about equal 

 width. 



RemarJcs. — This species has approximately the same distribution 

 as Ctenosaura pectinata and on account of the great similarity to it 

 may be mistaken for it. Both species frequent trees, but are more 

 often seen scurrying about on the ground and among the rocks. The 

 chief difference between the two species is to be found in the struc- 

 ture of the head. In hrevirostris the head is very short and the muzzle 

 is pronouncedly decurved, while in pectinata the head is long and the 

 muzzle only slightly decurved. 



Material examined. — 



Specimen 



Sex 



Age 



Locality- 



Date 



Collector 



Remarks 



U.S.N.M.: 

 12196... 

 12230... 



18968- 



18969... 

 24708... 

 24709... 

 24710-9. 

 24720-3. 

 24726... 

 31484... 

 47933... 



58670. 

 63701. 



M. 



F. 

 F. 

 M. 



63702-31. 

 63732...- 



63733 



63734-68. 



M. 

 F. 

 F. 

 M. 



F. 



M. 



fM. 



\&F. 



M. 



M. 

 fM. 

 \&F. 



Young. 

 do. 



Adult. 



do 



do 



Half grown. 



Young 



do 



Half grown. 



Young 



Adult 



Half grown. 

 Young 



}....do 

 -.do. 



..-.do. 

 ....do. 



Colima, Mexico... 

 Sierra Madre Mi- 

 choacan, Mexi- 

 co. 

 San Marcos, Ja- 

 lisco, Mexico. 



do 



Colima, Mexico.. 



do 



do 



do. 



do 



do 



Guichicovi, Oax- 



aca, Mexico. 

 Colima, Mexico... 

 Manzanillo, Coli- 

 ma, Mexico. 



Colima, Mexico... 



Tonala, Colima, 



Mexico. 

 do -. 



Colima, Mexico. 



July 1, 1865.. 

 (?) 



Mar. 26, 1892. 



Mar. 30, 1S92 do 



(?). 



(?) -— . 



(?) 



(?) — - 



(?) — 



(?) .- 



June 26, 1895. 



July, 1902 



February, 

 1863 



(?) 



(?) — - 



(?) 



July, 1863. 



J. Xantus- 

 (?) — 



P. L. Jouy. 



J. Xantus 



do 



do 



do 



do 



do 



Nelson and 

 Goldman. 



J. Hurler 



J. Xantus 



do. 



do. 



-..do . 

 .—do. 



2 specimens. 



Cotype. 

 Do 



10 specimens. 

 4 specimens. 



30 specimens. 

 2 specimens. 



35 specimens. 



CTENOSAURA PARKERI, new species 



Plates 14, 15 



Type.— Chi. No. 18967, U.S.N.M., adult female. Barranca Ibarra, 

 Jalisco, Mexico. April 22, 1892, P. L. Jouy. 



Paratypes. — Cat. No. 18970, U.S.N. M., a half-grown female having 

 same data; Brit. Mus. No. 1, adult male; No. 75, half-grown male; 



