The female of this fly changes to the grey drake, and the male to the black drake. They are little used.
No. 25. The Hazel Fly.
This is a beetle, the pupa of which inhabits the earth. It is found upon poplar-trees, and a species very similar is found upon fern. It is blown upon the water, and is to be used on windy days.
Imitation.
Body.—A black ostrich herl and a peacock’s herl, twisted together on red silk.
Wings and Legs.—Made buzz with a dark furnace hackle.
As this fly never alights upon the water, it is generally seen struggling with its wings in motion.
No. 26. The Dark Mackerel.
This is the imago, or perfect state of another kind of green drake, darker than No. 24. It is found in some waters where the true green drake is not, and is used in its stead.