| Common Name | County | Date | Observer(s) | Number | Comments | Record Type |
| 1 Prince Baskettail [Epitheca princeps] | Washington | 2018-09-03 | B. Bockhah, K. Kittelberger | 1 | PETT | Sight |
| 2 Prince Baskettail [Epitheca princeps] | Washington | 2017-06-16 | Mark Shields | 10 | Conaby Creek, from boating access area to 2.25 km upstream by kayak | Photo online |
| 3 Prince Baskettail [Epitheca princeps] | Washington | 2017-06-02 | Mike Turner | 1 | Pettigrew State Park | Sight |
| 4 Prince Baskettail [Epitheca princeps] | Washington | 1973-07-13 | R. Duncan Cuyler | 1 | sex=MALE, city=Plymouth, directions=NE on Rt. 45, habitat=Conaby Creek, source=R DUNCAN CUYLER COLLECTION-FSCA | Collect |