Importing records from JSTOR

You can export directly to EndNote.

Use the check boxes to select the citations for export
At the top of the results list, click on Save Citations
You will have to login to your JSTOR account (or set one up if you do not have one)
After login click on MyJSTOR at the top of the screen, and select Saved Citations
This will display the list of saved citations - Select the ones you wish to export and click on Export Citations
When the new screen appears - click on the EndNote option
Click Open
Save records to an open EndNote library or when prompted choose the EndNote library in which to save these records

Alternativerly you can export citations one at a time by clicking on the Export this Citation link - there is no need to set up an account.