While perusing a craft store (AC Moore I believe), I found some coated copper wire. It comes in small and progressively larger diameters. Also, its made in different colors – black, copper, gray, olive. I got the idea to use it for stonefly ties as well as brassies, copper johns, and ribbing on various flies. It works great and has the added bonus of adding weight to the fly and a little glow. I usually taper the underbody and wind the wire over the abdomen of the stonefly.
One other trick when using larva lace, is to wrap the underbody with tinsel, crystal flash, or anything shiny or metallic. The translucent larva lace in the lighter colors takes on a glow that trout seem to be very found of.
Coughlin – the tiny winter black stoneflies are very slender and are size #16 nymph hook or even smaller. Larva lace would be too bulky for them. You may want to use sparse black dubbing with a black or silver wire rib, or an all black wire abdomen when tying these flies.