How does one depict synchronous JMS communication in sequence diagram?

Screen shot 2012-01-14 at 6.19.19 PM.png

So I have an assignment to make synchronous JMS call to an external system, wait for response and then continue processing. While a synchronous blocking JMS(response/reply) model is in itself a little questionable, I'm struggling with how to show this in a sequence diagram?

Here's what I have now... please advice! Thanks!!

In my design the external queues were represented in a similar manner,I used asynchronous communication

I have not had to represent this before either, but this looks like the way to go

Hi

Just wondering if your sequence flow contains a call to a web service should you handle in the same manner or should you just show a call to your object which calls the Web Service.

Thanks
Joe