Occasional Papers of the Museum of Zoology 17 



run with great speed and occasionally seek shelter in burrows. 

 A large female taken on July 13 contains eggs but a second 

 one does not. The first young (129 mm. in total length) were 

 seen on August 14. 



The stomachs examined only contain insect remains ; vege- 

 table matter is entirely wanting, as in those from New Mexico 

 and Arizona examined in 1906^, which is at variance w'ith 

 Merriam's statement^ that the "leopard lizard is chiefly a vege- 

 tarian." 



Crotaphytiis collaris bailcyi (Stejneger). 



Seven males and seven females from the Cortez Mountains 

 at the Humboldt River. 



Our material agrees with the type description, and shows 

 that the characters used to distinguish the form are suffi- 

 cient. The snout is longer than in C. collaris and there are 

 two rows of interorbital scutellae in every specimen. The 

 coloration of our specimens is the striking and variable one 

 characteristic of the species. In both males and females the 

 black collars are well defined and but narrowdy interrupted on 

 the median dorsal line. In the females they are both broadly 

 interrupted on the throat, but in the males the anterior band 

 is broadly continuous in this region. All of the males have a 

 large black blotch in the region of the groin. The femoral 

 pores are 14-19, average in thirteen specimens 16.5. 



We only found the collared lizard in one locality and habi- 

 tat — the rocky summits of the Cortez Range at the Humboldt 

 River. It was not common, as not more than six were ever 

 seen in four or five hours work, and on many days we could 

 not find a single specimen. On one or two occasions we ob- 

 served individuals on the ground, but they were mostly found 

 on the rocks. Apparently they do not climb with the facility 



^Bull. Amer. Mus. Nat. Hist., XXIII, 517-518. 

 6No. Am. Fauna, No. 7, 168. 



