Morulina delicata n. sp. (Neanuridae), from Great Smoky Mountains National Park and surrounding areas, differs from other Morulina spp. in having eight large tubercles on the prothorax, rather than six, and a slender mandible with narrow, elongated basal teeth. Morulina callowayia, originally described from western North Carolina, is redescribed from type specimens and freshly collected specimens, and a lectotype is designated. It resembles M. gigantea of the northern Palearctic and Alaska but has only four setae on the ocular tubercle (five or six in M. gigantea) and is highly plurichaetotic. Morulina crassa is redescribed from numerous specimens.