Sorry, I thought (for some reason) that the photo was already placed into the species page. Thanks, Ken.

I haven't reared Chauliodes, but I have reared out several of our western corydalids. It's pretty easy if you've collected mature larvae. Set up a container with moist soil from their habitat. I usually scoop up a handful or two from the bank. Make sure the container has a lid and that there's enough room for the adult once it emerges. You can hollow out a space in the soil for the larva, place the larva into this space and cover with a flat rock, piece of bark, etc. I've found that this part isn't totally necessary as the larva will dig its own hole but it's convenient if you'd like to check on the progress. I usually run several rearing chambers at once to ensure I get adults, but I've had very low mortality using this method.

Thanks! So if I've collected these larvae from the logs they were presumably going to pupate in, does that necessarily mean they were just about to pupate? what type of time frame do you usually see when you've collected larval Corydalids?

I've collected larvae that have pupated as soon as I set up their rearing chamber and gotten adults in a week or two. I've had other larvae I collected, placed in the rearing chambers and then gave up on them as dead after a couple months only to get adults after that.

I agree -- if yours were in logs, they were probably preparing to pupate. For those, I would use parts of the rotten log as the substrate rather than soil.