  We have conducted a systematic search for high proper motion stars in the
Digitized Sky Survey, in the area of the sky north of -2.8 degrees in
declination and within 25 degrees of the galactic plane. Using the SUPERBLINK
software, a powerful automated blink comparator developed by us, we have
identified 601 stars in the magnitude range 9<r<20 with proper motions in the
range 0.5 to 2.0 arcsec/yr which have not been observed with the HIPPARCOS
satellite. Among those, we recovered 460 stars previously listed in Luyten's
proper motion catalogs (LHS, NLTT), and discovered 141 new high proper motion
stars, ranging in magnitude from R=13.0 to R=19.8. Only 9 stars from the Luyten
catalogs that were not observed by HIPPARCOS could not be recovered with
SUPERBLINK: 3 had proper motions larger than the search limit of the code
(>2.0\arcsec/yr), and 5 were missed because they were either too bright for
SUPERBLINK to handle or they are in the immediate proximity of very bright
stars. Only one of Luyten's stars (LHS1657) could not be recovered at all, even
by visual inspection of the POSS plates, and is now suspected to be bogus. The
very high success rate in the recovery by SUPERBLINK of faint Luyten stars
suggests that our new survey of high proper motion stars is at least 99 percent
complete for stars with proper motions 0.5 to 2.0 arcsec/yr down to R=19. This
paper includes a list of positions, proper motions, magnitudes, and finder
charts for all the new high proper motion stars.
