For example, among the woodpeckers, the northern form of the Hairy Woodpecker was first discovered and bears the name Dryobates villosus; but the first Downy Woodpecker described was a southern bird, and the northern form was not separated until a few years ago, so that the southern bird is the type, and the northern one bears the Trinomial, Dryobates pubescens medianus.
"The Woodpeckers"
Fannie Hardy Eckstorm