warning coloration and sufficient toxicity to dissuade predators. Dictyophorus productus (Pyrgomorphidae) is a "heavy, bloated, sluggish insect" that makes no attempt to hide; it has a bright red abdomen. A Cercopithecus monkey that ate other grasshoppers refused to eat the species. Another species, the rainbow or painted grasshopper of Arizona, Dactylotum bicolor (Acridoidea), has been shown by experiment with a natural predator, the little striped whiptail lizard, to be aposematic. Relationship with humans In art and media Grasshoppers are occasionally depicted in artworks, such as the Dutch Golden Age painter Balthasar van der Ast's still life oil painting, Flowers in a Vase with Shells and Insects, c. 1630, now in the National Gallery, London, though the insect may be a bush-cricket. Another orthopteran is found in Rachel Ruysch's still life Flowers in a Vase, c. 1685. The seemingly static scene is animated by a "grasshopper on the table that looks about ready to spring", according to the gallery curator Betsy Wieseman, with other invertebrates including a spider, an ant, and two caterpillars. Grasshoppers are also featured in cinema. The 1957 film Beginning of the End portrayed giant grasshoppers attacking Chicago. In the 1998 Disney/Pixar animated film A Bug's Life, the antagonists are a gang of grasshoppers, with their leader Hopper serving as the main villain. Symbolism Grasshoppers are sometimes used as symbols. During the Greek Archaic Era, the grasshopper was the symbol of the polis of Athens, possibly because they were among the most common insects on the dry plains of Attica. Native Athenians for a while wore golden grasshopper brooches to symbolise that they were of pure Athenian lineage with no foreign ancestors. In addition, Peisistratus hung the figure of a kind of grasshopper before the Acropolis of Athens as apotropaic magic. Another symbolic use of the grasshopper is Sir Thomas Gresham's gilded grasshopper in Lombard Street, London, dating from 1563; the building was for a while the headquarters of the Guardian Royal Exchange, but the company declined to use the symbol for fear of confusion with the locust. When grasshoppers appear in dreams, these have been interpreted as symbols of "Freedom, independence, spiritual enlightenment, inability to settle down or commit to decision". Locusts are taken literally to mean devastation of crops in the case of farmers; figuratively as "wicked men and women" for non-farmers; and "Extravagance, misfortune, & ephemeral happiness" by "gypsies". As food In some countries, grasshoppers