Found this one here; apparently, this pattern goes all the way back to Dame Juliana Berners. Per the Oxford English Dictionary the word ?loup? is an Old Norse verb meaning ?to leap,? and the fly probably represented a terrestrial of some sort.

hook - Dai Riki 075 #10
thread - Danville 6/0 black
rib - peacock herl, x-small wire copper
body - dubbing black
hackle - hen furnace