Latter part of April and throughout May.
No. 13a.
Dark Watchet or Iron Blue Dun.
Ephemeridæ.
Hook 0 or 00.
Wings.—Hackled with a dark smoky blue feather from a Jackdaw’s throat.
Body.—Orange and purple silk, Nos. 6a and 8, twisted together, dubbed very sparingly with Mole’s fur and wound on the body so that the orange and purple show in alternate bands.
Head.—Orange silk.
Last week in April and throughout May, and sometimes early June. Particularly for dull days.