  We analysed the fine structure of the phase space distribution function of
nearby subdwarfs using data extracted from various catalogues. Applying a new
search strategy based on Dekker's theory of galactic orbits, we found four
overdensely populated regions in phase space. Three of them were correlated
with previously known star streams: the Hyades-Pleiades and Hercules streams in
the thin disk of the Milky Way and the Arcturus stream in the thick disk. In
addition we find evidence for another stream in the thick disk, which resembles
closely the Arcturus stream and probably has the same extragalactic origin.
