| Common Name | County | Date | Observer(s) | Number | Comments | Record Type |
| 1 Slender Baskettail [Epitheca costalis] | Washington | 2008-03-28 | E. Corey | 1 | SCRI - lone individual amongst group of common and mantled baskettails | Sight |
| 2 Slender Baskettail [Epitheca costalis] | Washington | 1991-04-17 | R. Duncan Cuyler | 1 | sex=FEMALE, city=Plymouth, directions=NE on Rt. 45, habitat=Roanoke River, addl_habitat=access area, source=INTERNATIONAL ODONATA RESEARCH INSTITUTE-FSCA | Collect |
| 3 Slender Baskettail [Epitheca costalis] | Washington | 1991-04-17 | R. Duncan Cuyler | 3 | Male=3, city=Plymouth, directions=NE on Rt. 45, habitat=Conaby Creek, source=INTERNATIONAL ODONATA RESEARCH INSTITUTE-FSCA | Collect |
| 4 Slender Baskettail [Epitheca costalis] | Washington | 1990-04-20 | R. Duncan Cuyler | 3 | Male=1 Female=2, city=Plymouth, directions=NE on Rt. 45, habitat=Conaby Creek, source=R DUNCAN CUYLER COLLECTION-FSCA | Collect |
| 5 Slender Baskettail [Epitheca costalis] | Washington | 1976-05-06 | R. Duncan Cuyler | 1 | sex=FEMALE, city=Plymouth, directions=NE on Rt. 45, habitat=Roanoke River, source=R DUNCAN CUYLER COLLECTION-FSCA | Collect |