R. Zweifel 1953 Sceloporus jarovi 7 mi. SW El Vergel (Jagunite) 7800', Chihuahua, Mexico 2264-71, 2256, 2316 Hz. July 4 This is by far the most abundant lizard here. They are relatively unrestricted ecologically, being found on rocky cliffs, boulder strewn hillsides and as fallen logs. The ecologic overlap with S. poinsetti noted near Piedrales (see species account for that form, June 27) is again evident here. The S. poinsetti restrict them- selves to rocky situations (cliffs, boulder strewn hillsides, rock retaining walls). S. jarovi and S. poinsetti were seen in the same rocky outcrop within inches of one another. S. jarovi is less likely to be found on logs and stumps in level areas of the forest where S. grammicus is common, but is more often seen on slopes.