I think the reason the crickets that are common are those particular ones is that a lot of the others have harder exoskeleton and are harder to digest (well, thats what I think I read anyway). I've been wrong one or twice though.
I meant does anyone use them as a food source? obviously for bigger lizards as they do appear to have a bit of chitin, but they were everywhere the other night at the jets game and it made me wonder
i used to use them as bait for fishing, they lived in the mud around my dam so i would ddig around catching them and then use them to go fishing worked really reallly well