Lysandra corydonius, the false chalkhill blue, is a butterfly of the family Lycaenidae. The species is distributed in south-eastern Europe, Caucasus, Transcaucasia, north-eastern Turkey, and north-western Iran. L.corydonius is very similar to Lysandra coridon but a slight violet sheen is present, especially in the outer area of the wings. It inhabits a wide variety of grasslands and woodlands. In Armenia it occurs from 1200 to 2000 m above sea level. The known larval host plants of the species in Turkey is Hippocrepis comosa, in the Caucasus - Coronilla varia. The species has not been assessed for the IUCN Red List. In Armenia from 2003 to 2013 its population increased.