In dead-end box-canyon east off Badwater Road, a few miles north of Mormon Point, Death Valley National Park, Inyo County, California, USA
February 14, 2016
This female was found in the late afternoon curled up within a corolla of Phacelia calthifolia
...just like her male counterpart nearby in the post below:
Examining the 3rd image in this series: The white spot on the central portion of the mandibles; and the absence of a white spot on the frons...both indicate this is P. basirufus
, according to Richards (1963,1966).