Quail Hollow County Park, east of Ben Lomond, Santa Cruz County, California, USA
August 24, 2014
I think this female is an
Apiocera...but I'm not certain it isn't perhaps an asilid? It seems to have a wee bit of a mystax around the base of the antennae, and a very slightly excavated vertex. But maybe not? And I'm somewhat skeptical as to whether
Apiocera would have such a substantial "duck-bill like" proboscis...though that's not out of the question.
Females of both families have rounded terminal abdominal segments (called anthophorites) bearing many pairs of stout spines (barely discernible in this photo).
Two male
Apiocera were seen nearby: