Authentification problems with local connections

I am trying to restrict access to my databases by adding the following lines
to the pg_hba.conf file: -

local dpstatistic password
local details password
host all 127.0.0.1 255.255.255.255 password

When I now try to access the database using:

[postgres(at)10 bin]$ psql -u dpstatistics
username: dpstats
password: dpstats

I get the following message:
"No pg_hba.conf entry for host localhost, user dpsuper, database
dpstatistics"

despite the fact that the user dpstats appears in the pg_shadow table: -

usename |usesysid|usecreatedb|usetrace|usesuper|usecatupd|passwd
|valuntil
----------+--------+-----------+--------+--------+---------+----------+-----
---
dpstats | 503|t |t |t |t |dpstats |

Is there an entry missing that I have over-looked, any help greatly
appreciated

Cheers

Graham