Definition of "lobo"

We used to pay a $20.00 bounty a head on lobos for a good many years, but stopped it because it was abused. Lobo scalps from Arizona, [...]

1983, David Earl Brown, The Wolf in the Southwest: the making of an endangered species

"That may be so," Donnelly allowed, "but there desperate men around these parts, especially wolfers who have been collecting bounties for lobo scalps since the big snows of the Hard Winter."

2001, Joseph A. West, Johnny Blue and the Hanging Judge, page 43