PTYCHODEIRA CYAXOGASTER. 347 



or rounded black spots. Beneath, the body is unicolor, whitish, or 

 greyish ; numerous interrupted series of linear spots are observed under 

 the head. A black, irregular spot may be seen at the insertion of the 

 fore-limbs. The series of dorsal spots extends along the upper surface 

 and sides of the tail ; the latter is maculated beneath with greyish. 

 The limbs above are transversely barred, and beneath of the same hue 

 as the abdomen. 



In some, probably male specimens, the streaks and spots- are less 

 distinct, immerging into the ground color. The sides of the abdomen 

 being of a reddish metallic hue, with black and bluish small spots. 



Loc. One specimen was collected at Valparaiso, Chile, 



3. PTYCHODEIRA STANTONI, Grd. 



SPEC. CHAR. Cephalic plates rugose. Auricular aperture moderate, 

 subdenticulated. Supralabials exiguous, elongated. Temporal scales 

 large. Sides of neck slightly wrinkled. Dorsal and lateral scales 

 subequal. Abdominal scales slightly keeled, posteriorly rounded. 

 Tail elongated and slender. Deep reddish-brown posteriorly, with 

 two light streaks on each side ; beneath unicolor. 



SYN. Proctotretus stantoni, GRD. in Proc. Acad. Nat. Sci. Philad. VII, 1854, 227 ; 

 &, in Gill is*, U. S. N. Astron. Exped. S. Hemisph. II, 1855, 221, PL XL, figs. 13-20. 



OBSERV. No specimens of this species having been collected by the 

 naturalists of the Expedition, we have simply recalled its characteristic 

 features to serve here as terms of comparison. 



Loc. Has been observed in the neighborhood of Santiago, Chile. 



4. PTYCHODEIRA CYANOGASTER, Grd. 



SPEC. CHAR. Cephalic plates smooth or slightly wrinkled (rumpled) . 

 Supralabials quadrilateral, oblong. Temporal scales moderate. 

 Auricular aperture large, simple. Sides of neck conspicuously 



