Illinois Natural History Survey - University of Illinois

So far you’ve chosen: Pit between eye and nostril absent; scales on underside of tail in 2 row; Some or all dorsal scales keeled s; Anal plate entire

Dorsal scale rows at mid-body 27 or more; back boldly blotched; prefrontal scales 3 or more; longitudinal stripes absent

Dorsal scale rows at mid-body fewer than 27; back without blotches; prefrontal scales 2; longitudinal stripes usually present