The Horned Lizards 



of the abdomen are smooth, and the chin scales are small and 

 regular with no enlarged rows. The enlarged scales of the back 

 are but slightly bristling. 



The horns are barely larger than those of Hernandez's 

 Horned Lizard; the central horns are the larger and of about 

 the same length as the horizontal diameter of the eye opening. 

 As with Douglass's Horned Lizard and its varieties, there is a 

 single row of spiny, marginal scales on the side of the body. 



Colouration. Dark reddish brown above, with four trans- 

 verse brown or black spots on each side of a pale band from 

 the back of the head to the tail; these spots are generally 

 bordered with yellow. The tail is banded. The abdomen is 

 yellow, spotted or marbled with black. 



Dimensions. Total Length 5} inches. 



Length of Tail, Male, 2\ 



Greatest Width of Body if 



Length of Central Horns \ " 



The tail of the female is much shorter than that of the male. 



Distribution. Extreme southern Arizona possibly New 

 Mexico and southwestern Texas. Northern and central Mexico, 

 generally. 



THE REGAL HORNED LIZARD 



Pkrynosoma regale, (Girard) 



In every character, this is the finest species of the genus. 

 It attains a considerable size (for the genus) and the circlet 

 of large, flat spines upon the rear of the head at once impart a 

 unique aspect. There are four large central head spines and 

 three spines upon each temple. All of these spines or horns 

 are in such perfect alignment that a crown-like effect is pro- 

 duced. 



0} all the species of Phrynosoma, this stands unique in the 

 possession of four central head spines (occipital spines). The 

 plates beneath and parallel with the lower lip plates (labials) 

 are exceedingly projecting. Tbere are two rows of enlarged scales 

 on each side of the chin. The scales of the abdomen are smooth. 

 There is a single row of spine-like scales along the side, and 

 beneath this, for a portion of the body's length, a much smaller 

 fringe. 



