The Gay Anties

The Gay Anties is a 1947 Warner Bros. "Merrie Melodies" cartoon short directed by Friz Freleng and written by Michael Maltese and Tedd Pierce. The short was released on February 15, 1947. The title is a play on words for the "Gay Nineties", a phrase that references the 1890s United States.
Plot.
A colony of ants surreptitiously invade a young couple's park picnic in the 1890s and contrive to steal their food. The gags include a scene in which the ants, frustrated three times in their efforts to make off with a sandwich, spread mustard on the back of the girlfriend's hand and trick the boyfriend into biting it, and one in which a female ant sings an overly melodramatic song ("Time Waits for No One") which gets the other ants to run for cover.