TEIID LIZAKDS OF TlIK GENUS CNEMlDOl'UOl! US 



21 



Tabic of forms icronglij assigned to CneinidopJwrus 



Date 



Species 



C. undidaius Wiegmaiin 



C. lacertoides Dumeril and Bibron 



C. longicnuda (Gray) 



C. heterolepis Tschudi 



C. praesign is Girard 



C. festiviis Lichtenstoin 



C. quadrilinealus Hallowell 



C. multilinealus Philippi. 



Suggested Status 



Ameiva V7idulata.^ 

 Ameiva lacertoides. 

 Ameiva longicauda. 

 Dicrodon heterolepis.- 

 Ameiva ameiva praesignis. 

 Ameiva f estiva. 

 Ameiva undulata.^ 

 Ameiva longicauda. 



C. lacertinus Philippi Ameiva lacertoides. 



C. grandensis Cope 



C. armatulns Cope 



C. macidatus Fischer 



C. affinis Fischer 



C. ccntropyx Steindachner 

 C. per nanus Steindacliner 



C. iumbezanus Steindachner I Dicrodon heterolepis."^ 



C. lentiginosus Garman ; Dicrodon lentiginosxis. 



C. amivoides Cope Ameiva undulata.^ 



C. leach i Peracca Ameiva lacertoides 



Ameiva lacertoides. 

 Ameiva edracantha. 

 Ameiva ameiva praesignis. 

 Ameiva. chrysolaema. 

 Dicrodon heterolepis.- 

 Dicrodon heterolepis.'' 



C. vittatns Boulenger 



C. roeschmanni Werner. 

 C. calcaratus Sinitsin 



Ameiva vittata. 

 Ameiva ameiva ameiva.^ 

 Kentropyx calcaratus. 



1834 

 1839 

 1845 

 1845 

 1855 

 1856 

 1860 

 1869 

 1869 

 1869 

 1876 

 1879 

 1883 

 1891 

 1891 

 1891 

 1892 

 1894 

 1897 

 1902 

 1910 

 1928 



1 The described subspecies of Ameita undutata are not worthy of recognition. 



' The writer expects to give full systematic treatment to Dicrodon heterolepis in a forthcoming report on 

 'The South American Lizards in the Collection of the American Museum of Natural History." 



3 Herr P. de Grijs of the Hamburg Museum, after examining the type of Cnemidoptiorus roeschmanni 

 Werner and comparing its characters with those elaborated in the original description, believes it to be 

 identical with Ameiia ameiva ameiva. The coloration is found to be "exactly like that of young Ameira 

 ameiva ameiva." With this information the writer feels no hesitancy in regarding Cnemidophorus roesch- 

 manni as a synonym of Ameiva ameiva ameiva. 



KEY TO THE FORMS 01" CNEMIDOPHORUS 



The followino: key has been used on man}^ specimens and, in spite 

 of all efforts, it is necessaiy to offer it with the knowledge that some 

 difficulty is to be experienced in the identification of certain types 

 of individuals, principally intergrades and anomalies. Xevertheless, 

 it will identity the great majority of specimens. 



The amount of variation found in many of the species is almost 

 unbelievable, and therefore, the distinctions used have often been 

 either extremely slight or of only normal or average value, so when- 

 ever possible, additional alternatives have been introduced in order 

 to increase the certainty of making correct identifications. In view 

 of this, the impossibility of preparing a serviceable natural or 

 fhylocj eiietic l-ey to the forms is at once apparent. 



1. Large ventral plate.s in less than 10 longitudinal series 2. 



Large ventral plates in 10 or more longitudinal series. 



C. murinus murinus (Lanrenti). p. 4G. 

 (Bonaire and Curacao, Dutch Leeward Islands). 



2. Frontoparietal plate double" H. 



Frontoparietal plate singlt; " 4(5. 



- In the section in which the frontoparietal plate is double, sometimes additional sutures 

 nuiy occur, multiplyini; the number of plates. Also an occasional variant may l)c found 

 with a single frontoparietal plate, which will, however, usually be partly divided. Con- 

 versely, ill the section in which \\\o frontoparietal plate is characteristically single, an 

 occasional si)ecimen will be found in which the frontoparietal plate is partly or even 

 wholly divided. These variants are rare and occur chiefly in tcfificUatus, Injiicrythnis, and 

 deppii. 



