CHECKLIST OF REPTILES OF MEXICO 129 



SCELOPORUS JARROVU OBERON Smith and Brown 



Sceloporus jarrovii oberon Smith and Buown, Publ. Field Mus. Nat. Hist., zool. 

 ser., vol. 24, 1941, pp. 253-257, fig. 24. 



Type.—V.S'NM. No. 105823; H. M. Smith and Rozella Smith, 

 collectors. 



Type locality. — Arteaga, Coahiiila. 



Range. — Southeastern Coahuila. Recorded only from the type 

 locality, from Diamond Pass, Mount Zapaliname, near Saltillo, and 

 from Sierra Guadelupe. 



VARIABILIS GROUP 



Species. — Nine forms, representing five species, are recognized in 

 this group. One form, S. variabilis olloporus Smith, is extralimital, 

 occurring from Guatemala to Costa Rica. 



Range. — Southern central Texas south to Costa Rica, entirely on 

 Atlantic slopes west of the Isthmus of Tehuan tepee. 



KEY TO SPECIES OF THE VARIABILIS GROUP OF SCELOPORUS 



1 . Series of femoral pores separated medially by no more than 6 scales 2 



Series of femoral pores separated medially by 10 or more scales 3 



2. Dorsal scales 69 to 76; scales around body 70 to 81; dorsal scale rows at nape 



18 to 21 parvus scutulatus (p. 131) 



Dorsal scales 58 to 69; scales around body 61 to 69; dorsal scale rows at nape 

 15 to 18 parvus parvus (p. 131) 



3. Ventral interfemoral scales separated from ventral thigh scales by a group of 



small scales one-third or one-fourth size of adjacent scales; a rudimentary 

 gular fold; lateral scales much less than half size of ventral scales; dorsal 



scales 69 to 83 couchii (p. 132) 



Ventral interfemoral scales more or less continuous with ventral thigh scales; 

 no rudimentary gular fold; lateral scales more than one-half size of ventral 

 scales; dorsals usually less than 69 4 



4. Dorsal scales 36 to 47; subnasal usually absent; shank and posterior surface of 



lower foreleg distinctly banded; spots on back distinct in both sexes; preocular 



usually divided; frontoparietals usually in contact medially _teapensis (p. 130) 



Dorsal scales 47 or more 5 



5. Males and feinales immaculate below; femoral pores usually 9 or less on each 



side (occasionally more in females); dorsal scales 48 to 55; frontoparietals 

 usually separated by an azygous scale; preocular usually entire; subnasal 



rarely present 6 



Males with red, blue-bordered areas on sides of abdomen; subnasal usually 

 present; frontoparietals usually in contact medially; preocular usually 

 divided 7 



6. Postrostrals usually 2, never 4; scales around body usually 53 to 58. 



cozumelae (mainland) (p. 130) 

 Postrostrals usually 4, rarely 2 or 3; scales around body usually 59 to 64. 



cozumelae (typical) (p. 130) 



7. Dorsal scales 59 or more 8 



Dorsal scales usually less than 59; dorsolateral light lines 1 and 2 half scale 



rows wide posteriorly; maximum snout-vent measurement about 74 mm. 9 



