The above spider is tied with waxed thread. Sometimes I wax the pearsalls and sometimes I don't as I'm aware it really alters the colour of the silk. Some schools of thought say wax it some don't, a big authority on spiders whom I won't mention here, once told me to always wax the silk as it will eventually rot. I don't fully agree with that, because of the fragile nature of a spiders makeup (sparse hackle, light silk, very lightly varnished) they get fairly well chewed the first time you catch something anyway, so I think they will disintegrate more through that before the silk rots. Though some spider patterns do call for the silk to be waxed as the silks colour changes when emersed in water.
Sorry emerger1981 I know you probably know all this already but thats my take on it.