56 BULLETIN 19 9, UNITED STATES NATIONAL MUSEUM 



Genotype. — Anolis bullaris Daudin {=Anolis carolinensis Voigt). 



Species. — Perhaps 350. Thirty-five forms are Usted here, but two 

 are not known from any definite locality, four are known only from 

 "Mexico," and the Mexican range of another is unknown. 



Range. — Southeastern United States to Brazil; West Indies. 



KEY TO MEXICAN SPECIES OF ANOLIS 



1. Tail strongly compressed 2 



Tail subcylindrical, no more than slightly compressed 4 



2. Two continuous rows of scales along middorsal line on tail, .barker! (p. 58) 

 One row of scales along middorsal line of tail 3 



3. Ventrals keeled sagrei mayensis (p. 59) 



Ventrals smooth cozumelae (p. 59) 



4. Dorsal scales as large as or larger than ventrals, and both strongly keeled. 5 

 Dorsal scales smaller than ventrals, or one or both sets of scales smooth; or, 



if body scales as above, occipital much larger than ear opening 8 



5. Supraorbital semicircles in contact or separated by a single series of scales. 



megapholidotus (p. 59) 

 Supraorbital semicircles separated by 2 or 3 series of scales 6 



6. Dorsal and ventral scales subequal in size metallicus (p. 59) 



Dorsal scales distinctly larger than ventrals 7 



7. Tibia 75 percent to 85 percent length of head (to anterior border of ear) ; adult 



size smaller, about 36 mm.; dewlap brilliant red with a large purple spot 



at base in life humilis uniformis (p. 60) 



Tibia 90 percent length of head, or longer; adult size larger, about 50 mm.; 

 dewlap red, without a purple spot tropidonotus (p. 60) 



8. Ventrals smooth 3' 9 



Ventrals keeled 25 



9. Supraorbital semicircles in contact and a single row of only 4 or fewer large 



supraoculars 10 



Supraorbital semicircles separated or, if in contact, supraoculars numerous (8 

 or more enlarged) 14 



10. Two rows of loreals; female with a large gular "pouch"; all scales on body 



flat and granular, small and equal on back and sides, larger on belly. 



impetigosus (p. 60) 



Four to six rows of loreals; females (not known in schmidti) lacking a large 



gular pouch; dorsal scales keeled, at least faintly larger than lateral scales. 



11 



11. Ventrals and dorsals subequal in size; enlarged supraoculars three-fourths 



width of supraocular area schmidti (p. 60) 



Ventrals distinctly larger than (at least 1% times as large as) dorsals; enlarged 

 supraoculars narrower, half width of supraocular area or less 12 



12. Two gulars in contact with mental between chin shields; 9 or fewer scales 



across snout between second canthals (counting as the first canthal that 



which borders the superciliaries) 13 



Three or (generally) 4 gulars in contact with mental between chin shields; 

 10 to 12 scales across snout between second canthals gadovii (p. 61) 



13. Six scales between nasals; 5 scales in contact with rostral between supralabials; 



ventrals larger dunni (p. 61) 



'« In six species (cymbops, laeriventris, limifrons rodriguezii, milleri, schiedii, and schmidti) the ventrals may 

 appear either smooth or keeled; these are keyed out under both categories. All others are uniformly and 

 plainly either smooth or keeled. 



