Coluber constrictor etheridgei from Tyler Co., TX 2. Coluber constrictor anthicus Black, blue, or olive-gray ground color splattered with numerous light colored scales. Belly is white with a few pale yellow spots while chin, lips, and neck are yellow. Coluber constrictor etheridgei Uniformly tan or similar to the Buttermilk racer, but with a tan ground color.
Ventral surface is white or gray with pale yellow spots.
Coluber constrictor flaviventris Olive dorsal color with cream or yellow ventral surfaces. Coluber constrictor oaxaca Greenish gray dorsal color, lighter on sides of body. Ventral surfaces are yellow or yellow-green. Coluber constrictor priapus Charcoal dorsal color with ventral coloration varying from charcoal to yellow-gray. White chin and throat.