CROCODILIANS, LIZARDS, AND SNAKES. 



645 



EUMECES GUTTULATUS Hallowell. 



Eumeces guftulaius Cope, Check-list N. Amer. Rept., 1875, p. 45. — Botlengek, 



Cat. Liz. Brit. Mus., IH, 1887, p. 369. 

 Lamprosaurus (juttalatm H.vllowkll, Proc. Acad. Nat. Sci. Phila., 1852, p. 206; 



Sitgreaves' Exped. Ziini and Color. River, 1853, p. 103, pi. iv. 

 Plestiodon guttulatm Hallowell, Proc. Acad. Nat. Sci. Phila., 1857, p. 215. 



Plates of head generally similar to those of P. quinquelineatus. The 

 frontal small, transversely lozenge-shaped, and about equal to the post- 

 frontals. Quite acute laterally, where it touches the posterior post- 

 nasal. This is higher than the loreal and is about twice the area of the 

 anterior post nasal passing above it, the two of about the same length 

 and together about as long as the loreal. The limbs are short, the 

 hinder applied forward, reaching halfway to the ear, and contained 

 rather more than two and one- 

 half times in the body. The 

 forelegs reach to the angle of 

 the mouth and are longer than 

 the head. The hind leg from 

 knee is "contained three and 

 one-half times in head and 

 body and is one and one third 

 times the head to ear, which 

 again is contained four and 

 one- half times in head and 

 body. The first toe is rather 

 shorter than fifth ; the free por- 

 tion of longest toe very little 

 more than half the head (to 



ear). Scales on sides arranged very obliquely, so as to render it impos- 

 sible to count the en('ircling series. There are, however, about twenty- 

 eight rows, and about fifty-seven from head to tail. 



The very young in this species (head and body, 37.5 mm.) is entirely 

 black, the end of the tail becoming bluish; each plate on the side of 

 the head above, each labial, upper and lower, and each mental plate 

 with a conspicuous, rounded, bluish-white spot occupying all but the 

 outer border. The etfect is that of three rows of spots on the side of 

 head and one on each side the chin. The middle lateral, or that on 

 the upper labial, is continued backward as a large spot in front of the 

 ear and another on its i)osterior edge running out behind into a point. 

 There are traces of similar spots on the other cephalic plates, but 

 much less distinct. 



With advancing age the ground color becomes more olivaceous, paler 

 beneath, each up]>er scale with a posterior margin of darker olive 

 very well defined. These characters continue until the specimen is 

 75 mm. long, head and body (Cat. Xo. 31(52), the spots on the chin only 

 disappearing in the pale olivaceous green of tlie under parts. In Cat. 

 No. 31(51* the light line through the ear is continued faintly to the foreleg. 



Fig. 127. 

 EUMECKS GUTTULATUS HALLOWELL. 



x2. 

 Arizona. 



Cat. No. snfi, U.S.N. M. 



