546 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



Remarlcs. — This species is easily distinguished from the other 

 Peruvian species of this genus by the smallness of its dorsal scales. 

 In many respects it resembles Stenocercus humeralis from Ecuador, 

 but differs materially in the absence of a trace of denticulation ia 

 front of the ear and in the much larger caudal scales. 



Named for Dr. William G. Erving, the surgeon of the Yale Peru- 

 vian expedition of 1911. 



LIOL^SMUS ANNECTENS Boulenger. 



Eleven specimens collected between Cotuhuasi and Chuquibamba, 

 at an altitude of 15,500 feet above the sea, agi^ee substantially with 

 Doctor Boulenger's description.* He indicates ''two longitudinal 

 series of scales on the frontal region," but the specimens before me 

 show considerable variation in this respect, six having one row and 

 five, two rows. The scale rows around the middle of the body vary 

 between 56 and 70, two having 56, one 58, three 60, two 62, two 68, 

 and one 70. The anal pores of the males vary between 4 and 7, one 

 having 4, two 6, and three 7. 



OREOSAURUS LACERTUS, new species. 



Diagnosis. — No loreal; three supraoculars; two submental pairs m 

 contact; twelve longitudinal series of ventrals; anterior row of pre- 

 anals two, posterior four to six. 



Habitat. — Peru. 



Type-specimen. — Cat. No. 49551, U.S.N.M.; Tincochchaca, 7,000 

 feet altitude; August 10, 1911. 



Description of type-specimen. — Adult male. Fronto-nasal quadran- 

 gular, as broad as long; frontal pentagonal, narrower behind; fronto- 

 parietals as long as frontal, but narrower; parietals and interparietal 

 subequal, the latter seven-sided; three occipitals, the lateral ones as 

 large as the large supraoculars, the median one smaller pentagonal; 

 tliree supraoculars, the anterior smaller, descending in. front of eye; 

 no loreal; a row of scales between eye and supralabials; temporals 

 large, especially upper row; six upper and six lower labials; one 

 anterior unpaired chin-shield followed by two pairs m contact; 

 eleven transverse rows of scales between chin-shields and collar, a 

 series of granules between fourth and fifth rows, collar-shields ten; 

 dorsal scales elongate quadrangular iu transverse rows weakly keeled, 

 the median, row often consisting of subdivided or incomplete shields, 

 twenty-one in a row across the back, and separated on each side from the 

 ventrals by about two rows of coarse granules ; forty scale rows from 

 occiput' to base of tail; ventrals large, quadrangular in twelve lon- 

 gitudinal and twenty-one transverse series; six large preanal scales, 

 two in the anterior row, four in the posterior; six femoral pores on 

 each side; tail about one-fourth longer than head and body, the scales 



1 AuQ. Mag. Nat. Hist. (7), vol. 7, 1901, p. 546. 



