Wood, 2007: This species is xylomycetophagous, domicile parasites of other ambrosia beetles. The critical factor in host beetle selection appears to be the diameter of the entrance hole of the host beetle tunnel. After the host beetle has established its tunnel in small diameter stems (about 3-8 cm in diameter), this species arrives and force entry (apparently using the large prothoracic spines), and evicts the original tenants, eggs, larvae and boring dust. It then produces its own brood in that appropriated tunnel. Wood, 1982: Sampsonius spp. are ambrosia beetles. As with other Xyleborini, the males are flightless; therefore mating must occur in the brood chamber. The females are evidently incapable of excavating an entrance tunnel. They seek out a newly constructed tunnel of a Xyleborus species of appropriate diameter to accommodate their body and enter and often wait for the host to advance the tunnel adequately before clearing first one branch and then the other of eggs and young larvae; then they finally evict the host. Whether the host is removed forcibly or is repelled by offensive secretions or other factors was not determined. The Sampsonius female then deposits clusters of eggs in the tunnels. The larvae excavate tabular extensions of the gallery with the grain of the wood in much the same fashion as does the host species. They are found in branches or seedlings about 2-8 cm in diameter; they are very rare.The scolytid host species apparently was Dryocetoides capucinus.