HERPETOLOGY OF LOWER CALIFORNIA, 79 



chiefly Campestrian or tropical distribution, leaving fifty- 

 seven species which may be considered distinctively So- 

 noran. 



Thirty -eight species have thus far been found in the 

 southern part of Lower California,* as follows: 



Phyllodactylus tubereulostis, Lichauura trivirgata, 



Phyllodactyhis unctus, Chilomeniscus stramiueus, 



Ctenosaura hemilopha, Chilomeniscus fasciatus, 



Dipsosaurus dorsalis, Tantilla planiceps, 



Crotaphytus copeii, Lampropeltis conjuucta, 



Callisaurus draconoides, Lampropeltis nitida, 



Uta thalassina, Hypsiglena ochrorliynclia, 



Uta stansburiana, Phyllorhyuchus decurtatus, 



Uta nigricanda, Salvadora grahamia^, 



Sceloporus zosteromus, Bascauion flagellum freuatum, 



Sceloporus licki, Bascauion aurigulum, 



Phrynosoma coionatiim, Pituophis vertebralis, 



Gerrhonotus multicarinatus, Thamnophis cj'i'topsis coUaris, 



Xantusia gilberti, Natrix yalida, 



Cnemidophorus maximus, Natrix celaeno, 



Verticaria hyperythra, Trimorphodon lyrophanes, 



Eumeces lagunensiS, Crotalus atrox, 



Euchirotes biporus, Crotalus enyo, 



Eena humilis, Crotalus mitchellii. 



None of these have been found upon the tropical Mex- 

 ican mainland. Uta nigricauda, Sceloporus zosterofnus, 

 Phrynosoma coronatum, and Phyllorhyuchus decurtatus, 

 range considerably north of the confines of the " Cape 

 Region." Twenty-two of the thirty-eight species are of 

 very limited distribution, having been found only in the 

 extreme southern part of the peninsula. The remaining 

 twelve forms, mentioned below, extend their range over 

 a greater or less part of the Sonoran Subprovince, and 

 are among those characteristic of that area.f 



* Several species, as Xantusia vigilis, CJiarhia 'bottce, and Lampropeltis 

 californice, have often been credited to Lower California without evidence 

 of their occurring there. 



t Except Uta stanshuriana, which is also Campestrian. 



