We promised Dateline readers a green bug (as opposed to the black-and-white version in the newspaper) and here it is: a praying mantis, one of many green critters you can see at the Bohart Museum of Entomology from 1 to 5 p.m. March 21 during a free public program: “What Has Six Legs and Is Green All Over?” —all in keeping with a St. Patrick’s Day theme. The museum is in 1124 Academic Surge.