PLATE I. 



1. Sceloporus clarlcil B. & G. Type. (2940) 



'Sonora.' 



2. Sceloporus magister Hallow. (18126). 



Moliave Desert, California. 



3. Sceloporus zosteromus Cope. Type. (5298). 



Cape St. Lucas, Lower California. 



4. Sceloporus orcuili Stejn., sp.nov. Type. (16330). 



Milquatay Valley, San Diego County, Calif. 



5. Sceloporus houlengeri Stejn., sp.nov. Type. (14079). 



Presidio, western Mexico. 



6. Sceloporus floridanus Baird. Type. (2874). 



Pensacola, Fla. 



On all the figures — 

 a represents top of head ; all natural size except fig. 6, which is li times 



natural size. 

 I) represents the scales hordering the left ear anteriorly; all twice natural 



size. 

 c represents one of the dorsal scales; all 2| times natural size. 

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