I believe this is actually a C.crassiuscula. I've always understood the difference between crassiuscula and erechtea to be in the border of the forewing marking, as I have shown in this illustration of two BugGuide images . The C.erechtea has a curved border, while the C.crassiuscula has a straight border of the marking. There is also a slight difference in hindwing marking. If I'm wrong on this, I'll gladly concede, but this is the distinction I've always been familiar with between these two species. :)