Put a slight kink (stagger) in the shank, or use a Daiichi 1730 size 10 which comes pre-staggered. Slide a 3.8mm jet-black tungsten bead onto the hook small-hole-first and seat it behind the eye.
Start UTC 140 dark brown thread just behind the eye, using as few wraps as possible to keep bulk down.
For the antennae, tie in two separated strands of yellow barred sexy floss right behind the eye pointing forward over the eye; trim the butts, whip finish with a few tight wraps and cut the thread. Slide the tungsten bead back to butt against the antennae.
Behind the bead, wrap on about 20 turns of 0.015 lead wire and force it forward up into the bead. Restart the thread behind the lead, build a small thread ramp to jam the lead against the bead, then wrap back through the lead to lock it (a drop of superglue here stops it twisting).
Carry the thread to the bend and tie in two strands of yellow barred sexy floss for the tail, using thread tension to splay them into a separated V.
Tie in the variegated black-and-coffee stonefly chenille at the bend and wrap it forward in touching turns to form the segmented body, stopping short of the bead.
Tie in sets of yellow barred sexy floss legs Pat's-style along the thorax (a pair angled back on each side), then finish wrapping the body up to the bead.