Spotless Lady Beetle

Here is a photo of a mating pair. Look at the black and white part over the head (the pronotum): at the front of the female's, it's black. At the front of the male in the mating pair, the edge is white and he has a vertical white line in the middle also.
http://bugguide.net/node/view/460737/bgi...

Thanks Abigail for the Id. !!!!

Female ? Could you teach me how to identify ?

This is a female.