276 ANGUID^. 



twice and a half as long as head and body ; upper caiidal scales 

 usually much less strongly keeled than dorsals. Brown or brownish 

 olive above, with darker brown spots or with more or less regular 

 cross bands of black and whitish spots ; a series of black vertical 

 bars or annuli in the lateral fold ; usually a yellowish streak, some- 

 times bordered with black above, from below the eye to the angle of 

 the mouth ; lower surfaces yellowish or greenish white, uniform or 

 speckled with black. 



14. Gerrhonotus modestus. 



Pterogasteriis modestus, Cope, Proc. Am. Fhilos. Soc. xvii. 1877, 

 p. 97 ; Gilnth. I. c. p. 42. 



Differs from G. liocephalus in the absence of the small canthal 

 shield which truncates the lateral angle of the odd praefrontal, and 

 in the absence of keels on the dorsal scales, which are in ten or 

 twelve longitudinal series. Upper caudal scales strongly and 

 obtusely keeled. Colour above, brown ; below, olivaceous ; sides 

 reddish-brown or maroon, bordered above by a blackish line which 

 separates it from the dorsal colour. 



Total length 150 millim. ; length to vent 72 millim. 



Guatemala ? 



15. Gerrhonotus rhomhifer. 



Gerrhonotus rhomhifer, Peters, Mon. Berl Ac. 187G, p. 298 ; Gilnth. 



I. c. p. 42. 

 (Abronia) rhombifer, Bocourt, Miss. Sc. Mex., Rept. p. 332, 



pi. xxi. B. fig. 4. 



Head flat and elongate ; head-shields smooth ; three pairs of small 

 shields, the two anterior separated by two minute azygos shields, 

 between the rostral and a large azygos praefrontal, which is broader 

 than long and separated from the frontal by a pair of nearly equally 

 large prsefrontals ; nasal separated from the rostral ; two superposed 

 postnasals, upper minute ; three loreals, second not reaching the 

 labials ; four small outer supraoculars, and an odd shield between ; 

 fourteen upper labials ; temporal scales small. Sides of neck covered 

 with small square shields. Lateral fold feeble, commencing in 

 advance of the arm. Dorsal scales smooth, scarcely larger than 

 ventrals, forming sixteen to eighteen longitudinal scries. Ventrals 



