258 KXAKF.s, 'i'i'irri>Ks, uzAiins, CRdCdmLES 



kept in raptivih' easily and llii-iA'c on a diet of insects 



(Fio;. 17S). 



Fig. its. 



■il toatl IVorLi Texas 



The Gila monster. — There occurs in the southwestern 

 part of tlie United States, especially in New Mexico and 

 Arizona, the lartjest lizard in the United States, the Gila 

 monster. This lizard may attain a length of twenty inches. 

 Its body is deep black witii blotches of orange, and covered 

 by hard, rounded tul)ercles and scales. Recent experi- 

 ments have shown it to bo i)oisonous. The poison glands 

 are situated hi the lower jaw ueai' the anterior end (Fig. 

 179). 



