Fungus or normal molts?

[Lyssamichelle96]

I buy dubia roaches for my bearded dragon and have been buying from the same place for over a year. This time I notice white strings coming out of some of the molts.  I tried to google what it was but came up with results varrying from it being cordyceps fungus to it being perfectly normal. I was hoping someone on here could shed some light on what it is and if it is anything to worry about. I circled the molts in question in the pictures. I inserted a link to an imgur with the pictures because I couldn't figure out how to add them in the post.

http://imgur.com/gallery/pVCXNaj

 

[Nasut]

It's the tracheal system - since it is made of chitin, they have to shed those tubes from inside od their bodies too.