The Horned Lizards 



The large scales of the back have four keels, which combine 

 in forming a sharp point. 



Colouration. Pale brown, with a narrow, pale band on 

 the back. There are two obscure, dark blotches on the neck 

 and three or four dark blotches on each side of the back. All 

 the markings are obscure. Beneath, the colour is yellowish 

 white, with or without spots. 



Dimensions. Total Length (Grows to 7 inches). . . 5^ inches. 



Length of Tail if 



Greatest Width cf Body 2\ 



Length of Outer Pair of Central Horns f 



Distribution. Southern Arizona the Gila and Colorado 

 Deserts; Sonora, Mexico. 



This species has usually been considered very rare and is 

 seldom seen in collections, and the writer was much surprised 

 to examine a dozen living specimens, received in one shipment, 

 from Phoenix, Arizona, that had been collected by Mr. George 

 F. Breninger. Following is a portion of a letter from Mr. Brenin- 

 ger: 



'The horned toad I am now sending you is the true form of 

 the desert/' (This refers to a specimen of Phrynosoma calidiarum). 

 "It is quite a different 'toad' from those taken about the city" 

 (P. regale) "which, I believe, have been brought from elsewhere, 

 for ten years ago they were rare." 



The writer has also received several specimens of the Regal 

 Horned Lizard from Tucson, Arizona. These were especially 

 large specimens, with quite distinct markings and pink horns. 



Habits. As a capti /e, this is one of the most hardy species 

 of the horned lizards. When handled it tries to defend itself 

 by thrusting its head upward and backward, thus bringing the 

 spines vigorously into contact with one's fingers. 



CERROS ISLAND HORNED LIZARD 



Phrynosoma cerroense, (Stejneger) 



The present species seems to be closely allied to the Pacific 

 Horned Lizard, from which it differs in having but a single row 

 of the spiny, marginal scales, and having rounded horns. There 

 are two central horns, and three successively enlarged horns 

 on each temple. On each side of the chin are three rows of 

 enlarged scales. The abdominal scales are smooth. 



