_Description._--A specimen in the University of New Mexico Natural History Museum (E. D. Flaherty No. 560, obtained one mile west and one-half mile south of Isleta, Bernalillo County, New Mexico, on May 31, 1959) was described as follows while its colors were still but little altered by preservatives: Top of head olive, supralabials pale gray, edged with black posteriorly; chin milky white, with dark edges posteriorly on fifth, sixth and seventh infralabials; dorsal stripe yellow; including middorsal row of scales and little more than adjacent half of row on either side of it; dorsolateral area olive-brown with row of black spots on its lower half, these spots elliptical, averaging about size of one scale on anterior part of body, smaller posteriorly; adjacent spots separated by interspaces of approximately their own length, irregular black markings on upper half of dorsolateral area not forming definite spots but fused longitudinally to form continuous black border to dorsal stripe; crescent-shaped red markings in areas between scale rows three to nine, these markings invading edges of scales, and themselves having ill-defined edges blending into the darker ground color; lateral stripe pale, yellowish gray, limited to scale rows two and three for most of its length, but including rows four and five in neck region; row of irregular black marks low on each side, with each mark centering on anterior part of lower half of scale of first row but overlapping onto corners of adjacent ventrals; approximately every other scale of first row so marked; ventral surface pale, suffused with bluish tint; most of ventrals marked on anterior edges with pair of semicircular black spots, each situated about two-thirds of distance from mid-line to lateral edge of ventral; these marks diminishing in size and finally disappearing on posterior part of body; ventral surface otherwise immaculate. Lepidosis normal for genus and species, with preoculars single on each side, supralabials 7-7, infralabials 8-8, ventrals 159, anal entire, subcaudals 77 (including terminal spine), paired except for second, third and fourth; scale rows 19 from neck slightly beyond mid-body, fifth on left side ending opposite 86th ventral; length from snout to vent 670 mm., tail 202 mm.