Bymainiella lugubris is a species of funnel-web spider in the Hexathelidae family. It is endemic to Australia. It was described in 1978 by Australian arachnologist Robert Raven.
The species occurs in New South Wales in alpine, snow gum woodland and open sclerophyll forest habitats. The type locality is the New England Plateau.
The spiders are terrestrial predators that build ground webs.