I still do not know what it is , A skipper or a duskywing larvae it resembles closely , Most are western or southern and not here are the matches I have found
That I was watching them eat Foxtail Grass is the big clue ,
I realize Corn Borer uses Foxtail Grass as a Host plant , but these do not match that either , With such a prevalent strpe pattern , you would think they would be an easy identfy ,,