Playing at the vice, thought i'd try putting a tail on a blob, if they can use foam to make it float, why not a tail to add movement, the fly is weighted to make it sink slowly.

There has been quite a bit about Mop Flies on various forums on the internet, so here is my take on this new fly.
​Above are Mini Mops, simple to tie. In fact, the same tying procedure as the "X" fly.s
The above are tied on #16's.
Below is the source of the material for the bodies.
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I have decided to finish with coaching as of October, however, i shall still continue to post on here with tips and tweaks as i come across them. Thank you to all of you who have followed me on these pages over the years, due to health reasons i find it a little difficult to summon up the energy to get rigged up to go wading, so it looks like it will be "still water" trout fishing from now on. 
Had a day at Amherst fishery on friday, (29th) C&R, used the detached bodied nymph shown in a earlier post (4 of) red one proved the fly of choice (for the fish) ended up with 10, mostly "Blues" 
It's now called the "X fly" as it first came to prominence at Exe Valley trout fishery. it has also worked at Hawkridge, Dever and Amherst. the body material comes in 8 colours, do give this fly/nymph a try.

This beetle's back is made from foam that has a shiny surface.

Tying:-
Hook ..............#10 - 12
Body...........Green & Black sparkle dub
Back...........Black foam
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Variation of below.

Skinny Fry for when the trout start to feed on them.

Tying:-
Hook............#10 - 12 L/shank
Body..........back Pearl Tinsel / front Red Holo
Wing........Grizzle hackle tips
Eyes/Head............Two flat eyes covered in UV Resin. 

 Rabbit Fur Version.
Tying :-
Hook.........14 - 16
Bead..........Black Tungsten
Tag..........Orange No. 5
Body........Rabbit Underbody Fur
Rib.........Fine Pearl Tinsel
​Hackle.......Grey Ostrich Herl

Olive Nymph.
Tying:-
Hook........#16 Jig hook
Bead.........2.3mm Tungsten
Tail........Olive Feather Herl
Body..........Olive Sparkle dubbing
Rib..........Fine Red Wire
Hackle........Olive Ostrich Herl
​Thread........Black 

This Nymph is ideal to hang below a Dry fly/Bung.
Tying :-
Hook.......Jig hook #16 or smaller
Bead.........2mm Pink
Tail.......P/Tail tips
Body......Spun Peacock Herls
Rib.........Fine red wire
Hackle........Red Ostrich herl
​Thread.......Red 

Hook.........#14
Body.......Foam strip, 1/8th square
Legs.......P/Tail Knotted
Thorax.......Black Sparkle Dub
Thorax cover.....Foam pulled back
​Wing.......Poly yarn.