Mealies! Grab a spray bottle, put some rubbing alcohol in it, and spray away! You can also dab each one with a paintbrush dipped in alcohol. This method can be used to remove the dead critters, but it takes longer..

thank you! Ive had plants for years but I've never had to deal with these. Should I do anything to my other succulents? They are in a big container together.

Inspect them all! A 'just in case' spraying wouldn't hurt!

Also, check them frequently and repeat if needed over the next few weeks, to make sure you get all the eggs and tiny young ones..