Female March Fly

Refer to Mating March Flies for more information on March Flies; also compare those photos to these, especially in terms of the translucence of the wings. I'm thinking this specimen probably belongs to the genus Penthetria because of her dark wings and "funereal" appearance. At any rate, it's obviously a female because of her elongated head and small eyes. Could be P. heteroptera, the Fall-flying March Fly.

References:
http://bugguide.net/node/view/184096 (Penthetria)
http://bugguide.net/node/view/184097 (P. heteroptera)