Caterpillar Invasion Don't touch

Looked like a whole herd was headed into my front gate. Even after I disposed of the intitial invasion, more kept coming. 

If you see them, "don't touch." 

Don't know how toxic they are, but am told if you touch them, at a minimum you'll need medication to relieve the itching. 

Watch your kids.  Small children tend to consider such insects new found playmates.