White-letter Hairstreak

Satyrium w-ablum

Scarce & localized in Britain.

Larva until June, Adult light green, with thin small oblique subdorsal stripes and brownish head:it generally takes such a position on the underside of a leaf that it resembles a small fresh leaf or a fold between the ribs. 

The Larvae feeds on Wytch Elm.

Above similar to unicolorous specimens of spini; the white band of the hindwing beneath commences more proximally. about the middle of the costal margin, and runs straight to the base of the tail, forming here a W.

Before the margin of the hindwing a bright red undulate band.

Flight period is from June-August.