326 S A IT R I A. 



traced along the upper surface of the tail to its tip. The limbs are 

 transversely barred with blackish-brown : the bands being likewise 

 margined with yellowish-olive, though, on the anterior pair, the latter 

 hue invades all the intervening spaces between the dark bands, leaving 

 no room for the ground color to appear. The sides of the body are 

 black-speckled, as also the hands and feet. The upper surface of the 

 head is almost of a uniform blackish-brown: the supraciliary ridge 

 and the rostral plate being light straw-color, of which a few specks 

 may occasionally be seen on the cephalic and occipital regions. The 

 sides of the head and neck are variegated with jet-black and yellowish- 

 white. The chin, throat, and a portion of the chest are whitish, over 

 which are interspersed small jet-black spots, of various shapes. The 

 abdomen and under surface of the tail are dull yellow, unicolor. 



In the female sex, the ground is paler, and a jet-black longitudinal 

 band may be observed from the temporal region, across the ear, to the 

 axilla : the abdomen being clouded with greyish meanders. 



Log. — The male specimen figured, and which was sketched from 

 life, was obtained in the Lower Cordilleras, just below Obrajillo. A 

 female specimen, of about the same size, was caught in the neighbor- 

 hood of Yanga, Republic of Peru. 



Plate XXYIII, fig. 1, represents Saccodeira ornaiissima, size of life. 



Fig. 2, is an upper view of the head ; 



Fig. 3, its profile ; and, 



Fig. 4, an under view of the same region. 



Fig. 5, the left hand, from above ; 



Fig. 6, the same, from beneath. 



Fig, 7, exhibits a group of dorsal scales ; 



Fig. 8, a group of abdominal scales. 



Figs. 2-8, are somewhat magnified views. 



Genus PROCTOTRETUS, Bum. & Bibr. 



Gen. Char. — Maxillary teeth simple and subconical. Palate toothed. 

 An external auricular aperture. Dorsal scales keeled. Neck and 

 back, properly speaking, not crested. Abdominal scales generally 

 smooth. Sides of the neck variously folded, with a few exceptions. 



