Small Htaccess issue

[T D S]

So I had a site setup on a subdomain which I moved to the main domain. I was trying to setup a 301 redirect from the subdomain to main but have ran into a problem

original url was in this format http://www.subdomain.some-domain.us i want to 301 redirect to http://www.some-domain.us but the code I used ended up doing this instead http://www.some-domain.us/subdomain

Options +FollowSymLinks
RewriteEngine on
RewriteCond %{HTTP_HOST} www.subdomain.some-domain.us$ [NC]
RewriteRule (.*)$ http://www.some-domain.us/$1 [R=301,L]

Could someone add me in fixing this issue

Alright got this and it works but seems there should be an easier way

RewriteEngine on
RewriteCond %{HTTP_HOST} ^directory.search-for.us$ [OR]
RewriteCond %{HTTP_HOST} ^www.directory.search-for.us$
RewriteRule ^/?(.*)$ http://www.search-for.us/$1 [R=301,L]
RewriteCond %{HTTP_HOST} ^search-for.us$ [OR]
RewriteCond %{HTTP_HOST} ^www.search-for.us$
RewriteRule ^directory/?(.*)$ http://www.search-for.us/$1 [R=301,L]

So right now it goes from subdomain.domain.com to domain.com/subdomain and then to domain.com

Is there a more proper way? or shorter version?