The black spots on the Magicicada's cephalothorax are a key to knowing when the cicada is ready to molt. Right now people in the Brood XIII area are finding nymphs with red eyes, but no spots. In Brood XIX most likely has black spots.
@KentuckyConjurer
Congratulations and I'm sorry to hear that.
I can't wait for them to emerge and sing their song of doom!!!!!