(BG) Least Skipper (Ancyloxypha numitor) possibly female 2016-9-21 Newark, DE
http://bugguide.net/node/view/1303626/bgimage
-Along with the more obvious marks what sealed the deal for me was near the middle of the top of the forewing. There is a dark spot in the middle of the wing beneath a darker vein (running about midway in the above visible area) and above that there is something that slightly resembles an arch.
-Here is another example of what I mean:
http://bugguide.net/node/view/812395
-This is the only image I could find of a Least Skipper that Cliff Ivy said "female" in the comments and I think it resembles mine. The only problem is, I have no idea if those marks are diagnostic for female or if there are other marks entirely that I'm missing:
http://bugguide.net/node/view/1383421/bgimage
mage