CHECKLIST OF REPTILES OF ME'XICO 57 



Seven or 8 scales between nasals; 6 scales in contact with rostral between 

 supralabials; ventrals smaller taylcri (p. 61) 



14. All dorsals and laterals equal in size, minute, granular; tibia 85 percent length 



of head (to anterior border of ear); scales of supraorbital semicircles en- 

 larged; head scales feebly keeled damulus (p. 61) 



At least 2 or more vertebral rows of slightly enlarged scales, or, if all dorsal 

 scales uniform, tibia less than 70 percent length of head, and either scales of 

 supraorbital semicircles not enlarged, or head scales perfectly smooth-. 15 



15. Scales of supraorbital semicircles, at least in the frontal and frontoparietal 



area, not or scarcely larger than scales between; tail compressed, sub- 

 triangular in section with a serrate crest; tibia much shorter than head 

 (70 percent or less) all dorsal and lateral scales equal in size. 



pentaprion (p. 61) 



Scales of supraorbital semicircles distinctly larger than scales between; tail not 



or onh' shghtly compressed, with httle or no crest 16 



16. Supraorbital semicircles either in contact or separated by a single series of 



scales; postanals enlarged in males (males not known in utoivanae, cymho-ps, 



beckeri, and baccatus) 17 



Supraorbital semicircles separated by 2 or 3 rows of scales; postanals not 

 enlarged in males (not known in guntherii) 22 



17. Interparietal smaller than ear opening 18 



Interparietal larger than ear opening 19 



18. Three loreal rows utowanae (p. 62) 



Seven loreal rows cymbops (p. 62) 



19. All dorsal and lateral scales equal in size, minute, granular, smooth; tibia only 



60 to 65 percent head length; all dorsal head scales smooth. 



beckeri (p. 62) 

 At least a few vertebral scales slightly enlarged, keeled; tibia longer in propor- 

 tion to head length; dorsal head scales smooth or not 20 



20. Upper head scales tricarinate baccatus (p. 62) 



Upper head scales smooth, shghtly rugose, or feebly unicarinate; postanals 



enlarged in males 21 



21. One series of 3 enlarged supraoculars; male lacking first digit on all four feet*^; 



dewlap red liogaster (p. 62) 



Two series of 7 to 9 enlarged supraoculars; males with 5 digits on each foot; 

 dewlap yellow laeviventris (p. 62) 



22. Tibia distinctly longer than head (15.5 mm. and 13.5 mm. respectively in the 



type and only known specimen) schiedii (p. 63) 



Head (snout to anterior border of ear opening) at least a little longer than 

 tibia 23 



23. Interparietal plate twice as long as ear opening, much larger than adjacent, 



very small head scales guntherii (p. 63) 



Interparietal plate not more than !){ times as long as ear opening, not more 

 than 4 times as large as adjacent scales 24 



24. Ventral scales only slightly larger than dorsals; one large scale in anterolateral 



corner of supraocular area, in contact with superciliaries and separated from 



enlarged supraoculars by one row of small scales milleri (p. 64) 



Ventral scales much larger than dorsals limifrons rodriguezii (p. 64) 



25. Head shorter than tibia 26 



Head longer than tibia 27 



" Materia Ireeently examined demonstrates that this species like others of Anolis possesses five digits on 

 both limbs in both sexes. 



