hi saw this advice on bugnation.co.uk
As long as they are not absolutely covering the larvae and stressing it (particularly bad if they are covering the spiracles), then it shouldn't be a problem, but watch it closely as they multiply as a result of adding the protein food. If they get bad you can put the larvae in bone dry sandy soil - 50/50 dry potting compost and sand- for no longer than 24 hours, you should see the mites vanish (but sand and soil must be absolutely dry).

I have a number of torquata about to hatch so I'll have larvae and maybe a spare male soon