59.019 Argynnis (Mesoacidalia) aglaja (Dark Green Fritillary)
ws: 58-68mm; Jun-Aug; common dog-violet, hairy/marsh violet (Viola riviniana/hirta/palustris); local especially on chalk downland throughout GB.
ID: Size and upperside similar to the other two large British fritillaries A.paphia (Silver-washed Fritillary) and A.adippe (High Brown Fritillary). A.paphia has a green hindwing underside crossed by silvery bands and lacking the white spots shown by A.aglaja and A.adippe. A.adippe has a post-median row of red eye-spots on the hindwing underside not shown by A.aglaja. The ground colour of the hindwing underside is greenish in A.aglaja and more orange in A.adippe.
Page published 25/05/2014