8o UNIVERSITY OF COLORADO STUDIES 



medium-sized individuals with the yellowish stripes quite distinct; 

 young specimens much darker than the adults, with the stripes very 

 indistinct. 



This lizard, like the other species of the genus, has the power to 

 break off its tail when it is seized by that part. The escaping tail-less 

 lizard regenerates a new tail. Specimens are often taken with a 

 small half-formed tail, showing the loss of a former tail. 



This skink ranges from Utah and Wyoming south into Mexico, 

 east into Kansas and Nebraska. 



Colorado specimens. — University Museum: four miles east of Wellington, 

 June 13, 191 1 (108 mm.), J. Henderson and R. M. Butters, No. 224; Greasewood 

 Lake southeast of Osgood, June 23, 1912 (90 mm.), J. Henderson, No. 225; State 

 Teachers^ College Museum: near Greeley, A. E. Beardsley. 



Eumeces guttulatus (Hallowell) 

 Blue-Spotted Skink 



Lamprosaurus guttulatus Hallowell, Proc. Acad. Nat. Sci. Phila., p. 206, 1852. 



Dorsal stripes wanting; a row of bluish spots over each eye and 

 on the chin; dorsal parts uniformly blackish in the young, becoming 

 olive green in the adult; tail of the young bluish; size small, length 

 less than five inches. Range, Colorado south to Mexico. 



Colorado specimen. — State Teachers^ College Museum: Corrizo Creek, Las 

 Animas County, A. E. Beardsley. 



Eumeces leptogrammus (Baird) 



Hayden's Skink 



Plestiodon leptogrammus Baird, Proc. Acad. Nat. Sci. Phila., p. 256, 1858. 



General color dark green above, bluish to dark blue below; five 

 dorsal stripes of greenish white dots, the mid-dorsal stripe being the 

 widest and most prominent. Range, Nebraska, Wyoming south to 

 Texas. 



Colorado specimen. — State Teachers^ College Museum: Big Bend, Weld 

 County, A. E. Beardsley. 



