SAN FRANCISCO — The U.S. Court of Appeals for the Ninth Circuit has stymied plaintiffs’ latest bid to revive a class action accusing Google of violating federal wiretap law by automatically scanning Gmail messages.

In a crisp order issued Monday, Circuit Judges Edward Leavy, Consuelo Callahan and Andrew Hurwitz denied plaintiffs’ request for interlocutory review of U.S. District Judge Lucy Koh’s order denying class certification. Represented by Texas’ Wyly-Rommel and Alabama’s Cory Watson Crowder & DeGaris, plaintiffs in Dunbar v. Google, 13-2430, claimed that the Mountain View company intercepted messages sent through its Gmail service to mine users’ personal information.