. "Pelopeus californicus (Saussure, 1867)" . . "*" . "The blue mud dauber (Chalybion californicum) is a metallic blue species of mud dauber wasp that preys primarily on black widow spiders. It does not build a nest, but uses nests abandoned by other mud dauber wasps. Like other mud daubers, it is rarely aggressive. It is similar in shape and colour to the steel-blue cricket hunter (Chlorion aerarium). Also the male population does not have a stinger, therefore it cannot attack and its sole purpose is for reproduction."@en . . . . . . "*Sphex c\u00E6rulea (Linnaeus, 1763)" . . "Blue mud dauber"@en . .