Those pincers matter here. Harvestmen have a stomotheca, a feeding chamber built from extensions of the pedipalps and first leg coxae, and it lets them chew and swallow solid particles instead of liquefying prey externally the way spiders must. This one is working a Rudbeckia disc, and the yellow flecks scattered across the dark florets are pollen — plausibly what it is after, since the group scavenges and grazes as readily as it hunts.