616 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.58. 



supranasais, which do not occur in any other species of Oreosaurus 

 nor in the closely related genus Proctoporus. These scales are very 

 regular in outline. The surrounding scales are in perfectly normal 

 position, which condition leads us to believe that these scales are 

 perfectly normal. 



15. OREOSAURUS LACERTUS Stcjaeger. 



Two specimens (U.S.N.M. Nos. 60699-700) collected by Erdis at 

 Nusta Hispafia, June 11, 1915; two (U.S.N.M. Nos. 60719-20) by 

 O. F. Cook at OUantaytambo, May 15, 1915; one (U.S.N.M. No. 

 60746) from the same locality, July 14, 1915, and two (U.S.N.M. 

 Nos. 60726-7) from Torontay, May 10, 1915, by Heller. 



1$. PROCTOPORUS OBESUS, new species. 



Diagnostic characters. — A loreal widely separated from the supra- 

 labials by the freno-orbital and nasal which are in broad contact; 

 one anterior unpaired chin shield followed by three pairs in contact ; 

 dorsal scales elongate, smooth, in 24 transverse rows; ventral scales 

 in 12 longitudinal rows. 



Range. — Eegion of Rusta Hispaiia, southern Peru. 



Type specimen. — Cat. No. 60748 U.S.N.M. ; Nusta HispaHa, south- 

 ern Peru, June 11, 1915 ; E. C. Erdis, collector. 



Description of type specimen. — Adult male: Head short, body 

 stout, limbs moderate ; frontonasal much longer than broad, slightly 

 longer than the frontal; frontal hexagonal; interparietal distinctly 

 longer than parietals, slightly narrower, once and a half as long as 

 frontal; three occipitals, the lateral ones much larger than the 

 largest supraocular; the median one about one-fifth as large as 

 either; three supi-aciliaries, the anterior one as large as the anterior 

 supraocular; a loreal widely separated from the supralabials by the 

 freno-orbital and nasal which are in broad contact; a single row of 

 large infraorbitals; temporals large; eight upper and six lower 

 labials ; one anterior unpaired chin shield followed by three pairs in 

 contact ; 10 transverse rows of scales between chin-shields and collar, 

 including the latter ; nine collar scales ; dorsal scales elongate, quad- 

 rangular, smooth, juxtoposed; in the middle of the body just twice 

 as long as broad ; scales on the upper part of the sides equal in size 

 to the dorsals ; these scales gradually and only slightly decretising in 

 size on the lower flanks ; a series of very small scales interpolated be- 

 tween each of the lateral rows from the point where they join the 

 ventrals for a short distance upward, these small scales sometimes 

 hidden in a longitudinal fold; about 44 scales from occiput to base 

 of the tail, 36 around the middle of the body, including the ventrals; 

 ventral plates quadrangular, nearly square, in 12 longitudinal and 21 

 transverse series ; two anterior preanals followed b}'^ four smaller mar- 



