ON THE REPTILIA OF PERU. 161 



Color above cinnamon-brown, below yellow ; sides, from ear to an indefinite 

 point on the tail, black, inclosing a narrow yellow band from axilla to groin. 

 Black on scapular region, pale bordered above. From nape to tail a median 

 series of small black spots. Head brown ; throat yellow. 



Tins handsome species differs from the L. stinccides of Spix in the absence of 

 a band of granular scales on the sides of the neck, and in the keeled scales of the 

 tail. The coloration is quite distinct. It differs in many specific details from the 

 Loxopholis rugiceps, Cope,* besides in the quadrate form of the abdominal scuta, in 

 which that genus differs from Lepidosoma. 



From the Maranon. 



5. Neusticcrus ecpleopus, Cope, sp. nov. 



Scales of the back small and flat, becoming granular on the nape. Mingled 

 with the former are large oval keeled scales in two separate rather irregular series 

 near the middle, and a double row of similar ones on each side. The sides are 

 thrown into vertical folds, which support mingled small and large scales. The 

 nape and sides of the neck are marked by rows of small round warts, of which 

 there are eight between the lines of the tympana. 



The abdominal scales are in eight longitudinal rows, the median as broad as 

 long, except at the sides. There is a well-marked collar of seven scales, large in 

 the middle and small exteriorly. In front of this are four or five cross series of 

 large scales, all but the posterior composed of two scales only. The throat is 

 otherwise covered with round, smooth, convex scales. The preanal region is 

 covered with three rows of scales, the anterior two containing two each, the last 

 or marginal including two large, and a small median one. The limbs above are 

 granular, with scattered tubercles ; femur and forearm in front, and tibia below, 

 with large scuta. Tail, with whorls of oblong scales with two keeled rows above, 

 which are separated by a few flat scales only. 



The head scuta are the usual ones, with the omission of internasals. The 

 parietals are about as large as the frontoparietals, and are separated by a larger 

 interparietal, which projects further backwards, forming with the parietals a nearly 

 rectangular outline, the angle median. Four infraorbitals, five supraoculars. A 

 loreal and upper preocular, which cover part of canthus rostralis. Temporal 

 scales granular. Upper labials seven, four to the coronoid process, large, especially 

 the fourth ; fifth subtriangular. Inferior labials four and five to coronoid, of which 

 some two are confluent in the typical specimen. A large postsymphyseal ; four 



* Proceed. Academy Phila. 1868, 305. 

 41 



