R. Zuerfel 1953 Sceloporus grammicus 7 mi. SW El Vergel (Jaguita) 7800', Chihuahua, Mexico 2304-2315 RZ July 1 Abundant in the pine forest. Usually seen on fallen logs, log fences and stumps. Most often take refuge under loose bark. The male possesses paired blue ventral patches edged medially with black. This black edging is diffusely represented in the female, the rest of the venter being orange-brown. The same orange-brown coloration is present on the male ventral surface areas not occupied by the blue and black. The throat in both sexes is gray with many 1mm diameter light spots, white in the female, blue in the male. July 3 These lizards seem to be restricted to logs and stumps in level areas in the forest, where they are abundant. I have seen none on the rockier slopes.