NO. 1992. YALE PERUVIAN EXPEDITION, REPTILES— 8TEJNEGEB. 547 



like those of the body, except the median pau* on the underside which 



are relatively broader, being nearly square. Color (in alcohol) above 



dark brownish gray with three blackish stripes continued on the tail, 



one median and one on each side of the back, five scales from the 



median stripe; underside uniform dark plumbeous, paler on throat 



and chin. 



Dimensions. 



mm. 



Total length 113 



Tip of snout to vent 50 



Vent to tip of tail 63 



Tip of snout to ear 11 



Width of head 7 



Fore leg .- 14 



Hind leg 19 



Remarks. — This species is most nearly related to Boettger's Oreo- 

 saurus petersi, but it has more longitudinal rows of ventral scales 

 and fewer femoral pores. It also resembles Oreosaurus ocellifer Bou- 

 lenger, but the latter has eight ventral rows and three pairs of sub- 

 mentals in contact. Boettger's species is said to have come from 

 Para, but in view of its close relationship to the two Peruvian species, 

 and the further fact that the other species of the genus are confined 

 to Colombia, Ecuador, Peru, and Bogota, there is good reason for 

 doubting its occurrence in Brazil, the more so since the unique type- 

 specimen in Museum Senckenbergianum was obtained m 1849 from 

 the museum in Mailand. 



The Yale Peruvian expedition of 1911 obtained six specimens of 

 this species, five from the ty]De-locality and one from Ollantaytambo 

 on July 20, 2,000 feet higher up. 



There is considerable variation both in coloration and m number 

 of scale rows. Thus the number of scales from occiput to base of 

 tail varies between 38 and 46; that of scales across the back between 

 21 and 23; and that of the ventrals from collar to vent from 21 to 

 26. The preanals of the posterior row vary between 4 and 6. In 

 the younger specimens the lateral dorsals diminish in size toward the 

 lateral granules, the outermost ones being scarcely distinguishable 

 from them. Variation in color consists chiefly in the lighter or darker 

 ground color and the presence or absence of the median dorsal dark 

 stripe; one specimen has the dorsal region irregularly sprinkled with 

 dusky dots and in most of the specimens is there trace of a light upper 

 edge to the dorso-lateral dusky stripe. 



Suborder SERPENTES. 

 CLELIA CLOELIA (Daudin). 



A single snake was collected by the expedition. It was taken at 

 Huadquinia, altitude about 5,000 feet. Its scale-formula is as fol- 

 lows: sc. 19; ventr. 206; an. 1; caud. 91; supralal. 7; oc. 1 + 2; 

 temp. 2 + 3. 



