CROCODILIANS, LIZARDS, AND SNAKES. 



875 



Baird and Girard give the following scutal tbrinuhe and ineasiire- 

 ments, the latter in inches: 



Cat. No. Localitj". Ga.strostegCH. 



1520. KioGraude 231. 



Fort Webster, Santa Rita del Cobre. 225. 

 Do 22.5. 



I add the following: 



Cat. No. Locality. Gastrosteges. Frosteges. Scales. 



8404. I'agosa, California 231. 65. 29 



8400. Oak Orcbard, Arizona 225. 58. 29 



Of sixteen specimens examined, twelve have 8-8 superior labials, 

 two have 8-9, and two have 9-9. Four have tweuty-nine rows of 

 scales, nine have thirty-one, 

 and two have thirty-three. 

 Six have between forty and 

 fifty dorsal spots on the 

 body; eight have between 

 filty and sixty, and two have 

 sixty to sixty-three. About 

 two-thirds have the centers 

 of the dorsal spots paler 

 than the borders, and the 

 remainder have the spots 

 black throughout. The only 

 constant character of this 



snbs])ecies as compared with P. sayi is the form of the rostral plate; 

 but Cat. No. 8401 is intermediate between the two in this respect. Some 

 specimens from Oregon are intermediate between it and the F. catenifer. 



The geographical range of this subspecies is the Great Basin from 

 Oregon south, the basin of the Coh)rado, and Arizona. 



The typical specimen of the Ghurchillia hellona Baird and Girard, 

 which can not now be found, came from the valley of the Itio Grande, 

 which is also the habitat of the P. sayi sayi. The second specimen 

 enumerated in Baird and Girard's Catalogue under the P. hellona is 

 from western Texas, between San Antonio and El Paso, and hence 

 from the same region as the type. This specimen belongs to the P. sayi 

 sayi. 



Pityophis sayi hellona Baird and Girard. 



Fig. 207. 



PiTTOPHIS SAYI BELLONA BAIED AND GiRABD. 



Figure copied from Baird in Report U. S. P.icific R. R. Survey, X, pi. i 



