simple remote user access question - pg_hda.conf

I can't seem to get the file configured correctly.

This works:
montgomery@spudbox1: psql mydb

This does NOT work:
montgomery@spudbox1:> psql -h 10.10.10.70 mydb
psql: FATAL 1: No pg_hba.conf entry for host 10.10.10.70, user montgomery,
database mydb

This does NOT work either:
montgomery@spudbox1:> psql -h 10.10.10.70 mydb -U montgomery
psql: FATAL 1: No pg_hba.conf entry for host 10.10.10.70, user montgomery,
database mydb

Ok, here's my setup:
host: "spudbox1"; 10.10.10.70 (database server, web server)
database: mydb (7.2.2); postmaster running with "-i".
user: montgomery (user was created on system, and also in db)

pg_hda.conf:
# TYPE DATABASE IP_ADDRESS MASK AUTH_TYPE
local all trust
host all 127.0.0.1 255.255.255.255 trust
host mydb 10.10.10.* 255.255.255.0 trust