  We present the results of our Hubble Space Telescope far-ultraviolet survey
of the blue lurkers (BLs) in M67. We find evidence for two white dwarf
companions among the BLs that are indicative of mass transfer from an evolved
companion, one in WOCS 14020 and the other in WOCS 3001. The cooling ages of
the white dwarfs suggest that mass transfer in these systems occurred
$\sim$300--540 Myr and $\sim$600--900 Myr ago, respectively. The rotation
periods and cooling ages of the BLs are consistent with spin-up and subsequent
single-star spin-down models, and binary evolution models yield plausible
evolutionary pathways to both BLs via highly non-conservative mass transfer. We
conclude that the BLs are lower-luminosity analogues to the classical blue
stragglers.
