This was along the Mary Bowerman Trail. Is it Lomatium utriculatum or Lomatium macrocarpum?
The wasp is Pseudomasaris vespoides.
Pair of them in an Oak tree.
Brief description of what you observed
Buck and several does with no intention of sticking around for a photograph.
On blue oak.
On valley oak.
Small colony on rocky cliff.
On California buckeye.