Well, they have a lot more exoskeleton than flour beelte larvae, but the auteranias love them. The tincs arent' too sure. One of the larger tincs ate three or four of them but the others didn't seem to want to try them.
Funny story (to me anyway). My auteranias are basically like my tincs, they'll eat out of my hands. Well to test the new worms I tried to feed one of the frogs sitting on a brom leaf, well I dropped the stupid worm down into the axil water where I couldn't see it. No prob, the auterania chased right after it and sucked it out of the water, too cool.
Due to the size of these things I would say they are definately for the adult frogs.
Also for anyone looking to buy them, they can get kind of expensive on ebay, I finally gave up tring to get them cheap and emailed the guy for some. They sell for $7 + $4 shipping.
Still not a replacement for the slow breeding flour beetles.
Joe