Moved from Ammophila.

Jim, these images show more great examples of the characters of a female! Thanks

ID info:
Jim, she looks like a western variant of Ammophila procera. Here is some reference information from DiscoverLife.org, that applies to the features of this specimen, in my opinion.

Variation. Ammophila procera is a highly variable species as a glance at the description will indicate. As in many wasps that range across the entire width of the continent there are two distinct chromatic types in procera. East of the Rocky Mountains procera is a predominantly black insect. The abdomen is usually all black in the male and the female has only gastral segment I red. In this form the erect head hair is black and there is usually no appressed silver hair on the gena. Westward, red becomes mere extensive on the abdomen. Specimens from the Great Plains region often have both the petiole tergite and gastral tergite II red laterally in both sexes. These individuals are represented on the map by circles with black centers. This intermediate color form merges with the pale western type of procera in the Rocky Mountains. The western form, represented by open circles on the map, typically has white erect head hair and appressed silver hair on the gena. The gaster is often extensively red in the female so that there are only a few black spots on the last few gastral tergites. In Arizona and New Mexico the entire petiole is often red and the erect hair may be very short. Variation in hair length and color and also body color, becomes very complex in Mexico and this fact probably accounts in part for the many names proposed for this one species.