Cannot clone wiki using ssh url

I can clone wiki repositories using HTTP:

{{

{\\ #! % hg clone https://dribin@bitbucket.org/ddribin/ddcli/wiki/\\ destination directory: wiki\\ requesting all changes\\ adding changesets\\ adding manifests\\ adding file changes\\ added 1 changesets with 1 changes to 1 files\\ updating working directory\\ 1 files updated, 0 files merged, 0 files removed, 0 files unresolved }

}}
but not SSH:

{{

{\\ #! % hg clone ssh://hg@bitbucket.org/ddribin/ddcli/wiki/\\ remote: abort: There is no Mercurial repository here (.hg not found)!\\ abort: no suitable response from remote hg! }

}}

I prefer SSH so I can use ssh-agent to keep from getting asked passwords all the time.