Sorry to hear about this.

In the US, it is a good idea to engrave your drivers license number somewhere discretely on all of your gear. This can often lead to recovery of stolen items.

There are some steps that you can take, however.

Print out a list of the stolen gear, make copies and take them around to the local pawn shops, used instrument stores, etc. and drop them off with the proprietors. Reputable proprietors will be glad to get the information. If you do not have your driver's license number engraved on your gear, sometimes you can still recover by showing the sales receipt, sometimes they might even just take your word for it.

--Mac