Merrifieldia leucodactyla ([Denis & Schiffermüller], 1775)
45.0330 (B&F: 1510)
Merrifieldia fuscolimbatus sensu auctt. nec (Duponchel, )
Merrifieldia icterodactylus sensu auctt. nec (Mann, 1855)
Merrifieldia tetradactyla sensu auctt. nec (Linnaeus, 1758)
Merrifieldia tridactyla sensu auctt. nec (Linnaeus, 1758)
A resident that is in danger of extinction. It generally occurs on chalk, but is very local and distinctly episodic in appearance. It is single-brooded, flying from mid June to mid July, occasionally from early June. The larval foodplant has yet to be determined in Sussex although wild thyme has been listed elsewhere. (Pratt, 2011).