The White-tailed Sylph is a Mexican species with a distribution extending to South America and that had until now been found once in the USA along the Mexican border (San Bernardino Wildlife Refuge, AZ, 2007; Odonata Central.)

A male was found on 14th October 2012 in the Hot Springs Canyon, Muleshoe Ranch Natural Conservancy Area, Cochise Co., AZ, thus providing a second US record for the species.