Spook-ify your mail with these four new stamps.

Halloween has long been a holiday that lets us delight in the things that scare us. As autumn approaches, these new stamps offer fun, frightful scenes that symbolize this annual celebration.

These four stamps feature digital illustrations in which traditional Halloween motifs are rendered as black silhouettes in eerily backlit windows: a spider and a spider web against a red background; three bats against a purple background; a cat with an arched back beneath a raven perched on a bare tree branch, all against a yellowish-green background; and two ghosts against an orange background.

With customs and traditions that vary widely by community, Halloween now inspires parades and carnivals, corn mazes and haunted houses, neighborhood and school parties, pumpkin festivals, and even pumpkin-catapulting. No matter how or where people observe this ever-changing holiday in the early 21st century, Halloween remains a much-anticipated celebration of the macabre in the face of approaching winter.

Artist Tyler Lang created the artwork for these stamps. Art director Greg Breeding designed the stamps.