I tied this after making some of Bob's Black and Ruby TCs for a friend going to East Lake in Central Oregon.
Next I wanted to add some thread color variations wrapped in Clear Stretch Magic for my own midge boxes. Researching on Trout Nut's Midge Pages 3 & 4 (http://www.troutnut.com/common-name/224/Midges), I found a couple of specimens from Washington that caught my eye because of the color shifts along their bodies from yellow, green, and to brown.
So here goes my variation...

Hook- Dai Riki 135 #16
Body- UTC 70 thread in thirds- Yellow, Light Olive, and Rust Brown
(Overwrapped in .5mm Clear Stretch Magic Beading Cord)
Rib- I brought the yellow thread forward over the olive and brown before wrapping the cord to the bead, and
finishing the collar to the bead with the brown thread.
Glass beads- Silver lined Rootbeer and Clear 11/0