106 Zoology of Colorado 



two other species, Hayden's Skink (P. leptogrammus of Baird) at 

 Big Bend, Weld County; and the Many-lined Skink (P. mufti- 

 virgatus of Hallowell) near Greeley. 



The Teiidae, or Striped Lizards, with deeply bifid tongue, 

 are represented by the genus Cnemidophorus. with three species. 

 The common one is the Six-lined Lizard (C. sexlineatus of Linn- 

 aeus), with narrow light stripes or lines on a dark ground, and 

 extremely long tail. It is found from Grand Junction to Wray, 

 and south to the vicinity of Trinidad. C. gularis of Baird and 

 Girard, with pale dots between the stripes, has been reported by 

 Cary from near Golden and other places. C. tessellatus of Say, 

 which is striped in the young, but irregularly blotched or marbled 

 in the adult, was first found in the Canon of the Arkansas, but 

 has recently been obtained at Grand Junction and elsewhere. 



Our remaining lizards are referred to the family I guanidae, dis- 

 tinguished from the above by the thick, non-protractile tongue, 

 and the dorsal scales dull, usually keeled. We have six genera 

 reported, but Dipsosaurus, given as from Colorado by Yarrow, is 

 a desert animal of the southwest, and its existence in Colorado 

 has not been confirmed. The body anteriorly has transverse 

 rows of light spots, and the long tail is conspicuously cross-banded. 

 It is peculiar for feeding on leaves and flowers. 



The so-called Horned Toads, better Horned Lizards, with 

 broad depressed bodies, cannot be mistaken for anything else. 

 Our common one is Phrynosoma hernandesi of Girard, considered 

 by Van Denburgh (1922) a subspecies of P. douglasii of the north- 

 west. The color varies, and specimens from red soil are likely 

 to be strongly reddened. Ellis and Henderson (1913) recognize 

 an upland or mountain form, true hernandesi, and a plains form, 

 the race ornatissimum of Girard. The latter was, however, origin- 

 ally described from the mountainous region of New Mexico, and 

 Van Denburgh, in his recent revision, considers all the Colorado 

 specimens to be ornatissimum. Both Girard's names were pub- 

 lished in the same work (1858), but hernandesi has page priority, 

 and should stand for the species, unless we refer both to the 

 aggregate P. douglasii. This common horned lizard has short 

 horns, but the Texas Horned Lizard (P. cornutum of Harlan) has 

 them considerably longer. It also has two rows of elevated 

 pointed scales along each side of the body, P. hernandesi having 



