Copy an entire directory from one server to another recursively:
From Local to Remote
scp -r FOLDER_FROM_LOCAL USERNAME@SERVER:/var/www/REMOTEFOLDER
From remote to local
scp -r USERNAME@SERVER:/path/to/REMOTEFOLDER /var/www/LOCALFOLDER
or to current folder
scp -r USERNAME@SERVER:/path/to/REMOTEFOLDER .
Useful Web sites
http://www.hypexr.org/linux_scp_help.php