AKA Daddy Longlegs
mass on wall of building
Hays Co., Texas
8 September 2012
The Phalangiidae are a family of harvestmen with about 380 known species. The best known is Phalangium opilio.
The guide said: "On cool afternoons adults climb sides of buildings, seemingly to benefit from residual sun" That is exactly how I saw it.
Another excellent restroom discovery. At least this one was on the floor!