Les Mouches Fantastiques was a Canadian underground magazine, published between 1918 and 1920. Based in Montreal, Quebec, it is the first known LGBT-themed publication in Canadian and North American history. The magazine arose out of a local writing circle established by poet Elsa Gidlow, with Gidlow and journalist Roswell George Mills as its primary contributors. The publication's working title, prior to the publication of its first issue, was Coal from Hades. Its content included both poetry and non-fiction writing about gay and lesbian identity and politics.