Gross and dead crickets...are the alive ones still safe?help

[shaninja]

So I went to Pets Unlimited to pick up some crickets while I waited for a shipment two days ago. As of today, 60% of them are dead and turning black...or maybe some of them were black to begin with. A lot of them are laying on their backs and moving a little bit. There's this one cricket with some white stuff coming out of his back and he can barely move. He looks super gross and I don't know if its safe to feed the rest of the alive and moving and seemingly healthy ones to my beardie. I noticed a small round white glob of something on the top of the feeder tank earlier, but it was the only one I could see. Thought I saw a little fly earlier too. Please help! He doesn't have much food except these crix and its a half hour drive to go get more so I'd like to know if its safe to feed the rest of them. Pics included of the gross, white, puffy cricket. Thanks.
http://m781.photobucket.com/albums/shaninja420

The pics may be upside down.

 

[AHBD]

Hi there...were these the crix from the pet store or the ones you ordered ? Sometimes they die in shipment if they get too hot. And yes, the live ones can be used. The puffy white one is just molting....they shed their old " skin" and come out like a soft alien,white with black eyes. Use up the ones that are dying first, then clean the actual dead ones out and give the live ones cricket food + drink.