Chipmunks are such destructive little creatures. Where your Fritillaria and Crocus bulbs are you can put down chicken wire. The bulbs will come up through the holes in the but the chipmunks don't like to try and dig in it. You can even place mulch over it. This will usually deter cats from using it as a little box area.
Another thing that some are using with very good success is Irish Spring bar soap. You can make shavings of it and place it around the areas the chipmunks are causing problems in.
Here are a couple of links. Hope some thing here helps. Would love to know what ends up working for you. It could help others with the same problem. : )
The thread "Pest remedies" in
All Things Gardening forum
