CHECKLIST OF REPTILES OF MEXICO 107 



24. Three or more rows of small scales between supraoculars and superciliaries; 



or, if two, the scales of inner row considerably larger than those of outer 



row 25 



One complete and one incomplete row of small, subequal scales between 

 supraoculars and superciliaries 27 



25. One canthal, or, if two, the first forced above canthal ridge_form.osus (p. 107) 

 Two canthals, the first not forced above canthal ridge 26 



26. A broad, black nuchal collar complete about neck dorsally, or anterior section 



of frontal longitudinally divided formosus (p. 107) 



Neither true undulatus (p. 117) 



27. Frontal ridges present forniosus (p. 107) 



Frontal ridges absent spinosus (p. 110) 



28. Adult males a uniform bright green above formosus (p. 107) 



Not so spinosus (p. 110) 



FORMOSUS GROUP 



Species. — Six, with a total of 11 forms. Extralimital are lunaei, m. 

 malachiticus, and m. smaragdinus .'^ 



Range. — Alichoacan and Veracruz south to western Panama. 



KEY TO MEXICAN SPECIES OF THE FORMOSUS GROUP OF SCELOPORUS 



1. Median frontonasal separated from lateral frontonasals 2 



Median frontonasal in contact with lateral frontonasals 4 



2. Dorsals about 31; internasals large, keeled, 3 from rostral to median fron- 



tonasal prezygus '^a (p. 109) 



Dorsals 37 to 45 ; internasals smaller, not keeled, rugose or not 3 



3. A complete nuchal collar, sometimes narrowly interrupted medially. 



malachiticus salvini (p. 108) 

 Nuchal collar incomplete malachiticus taeniocnemis (p. 107) 



4. Anterior section of frontal usually longitudinally divided; canthals sharply 



ridged; no nuchal collar; ventrals a fourth, laterals not more than two-thirds, 



size of dorsals asper (p. 109) 



Anterior section of frontal rarely longitudinally divided; canthals rounded; 

 a nuchal collar or not; ventrals a half, laterals three-fourths size of dorsals. 5 



5. A broad, nearly or quite complete, nuchal collar 6 



Collar, if present, restricted to sides of neck 7 



6. Femoral pores 12-16; one or more supraoculars generally in contact with 



median head scales malachiticus acanthinus (p. 108) 



Femoral pores 16-21; supraoculars not in contact with median head scales. 



stejnegeri (p. 109) 



7. Males without yellow on throat; dorsal scale rows black edged; dorsal head 



scales with a light blue center formosus scitulus (p. 108) 



Males with yellow or orange on throat; dorsal surface uniform blue; head 

 scales not light spotted formosus formosus (p. 108) 



SCELOPORUS MALACHITICUS TAENIOCNEMIS Cope 



Sceloporus taeniocnemis Cope, Proc. Amer. Philos. Soc, vol. 22, 1885, p. 399. 

 Sceloporus malachiticus taeniocnemis, Smith, Proc. U. S. Nat. Mus., vol. 92, 1942, 

 p. 356; Journ. Washington Acad. Sci., vol. 39, 1949, pp. 39, 40. 



" See Smith, Proc. U. S. Nat. Mus., vol. 92, 1942, p. SSC), for a key to these forms. 

 '2» Material examined since this key was originally prepared places this species in the torquatus group. 

 861316 — 50 8 



