As satire, "Greater Tuna" has its moments. Unfortunately, they are only moments -- in a show that lasts two hours.

Starring Joe Sears and Jaston Williams, who co-wrote the material with Ed Howard, it treats a mythical dust bowl of a town in West Texas, populated by boobs, bigots and yahoos not equaled since "The Texas Chainsaw Massacre."

Call it "Hee Haw" with a serrated edge.

In the Kennedy Center's Terrace Theater -- on a stage festooned with signs for the likes of Lone Star beer and Firestone tires, and against a painted backdrop of the empty Texas plain -- Williams and Sears play 20 characters, to wit: Struvie and Wheelis, the bumbling morning news team on radio station OKKK; Elmer Watkins, head of the local Klan chapter; Charlene Bumiller, a sourpussed would-be highschool cheerleader; and Charlene's Aunt Pearl Burras, who spends most of her waking hours killing stray dogs with strychnine.

If you get your news of Texas from Gore Vidal, life in Greater Tuna is about what you'd expect. Didi Snavely's weapons shop still sells used guns and knives; the Javalena Club, i.e. the women's auxiliary of the Wild Hogs, is enthusiastically banning subversive textbooks; and Didi's hubby R.R. is sighting chalupa-shaped UFOs.

Sears and Williams are an energetic pair, but much of the writing is as flat as a tortilla. After hearing their umpteenth lampoon of bigots in that exaggerated Texas twang, you might start taking radio station OKKK's sign-off to heart. "If you can find some place you like better than Tuna -- move!" GREATER TUNA -- At the Terrace Theater through August 14.