Empidonax oberholseri Phillips. Wright Flycatcher. Known only from three specimens, May 8 (male and female) and May 12 (male), 1950, eight miles south of Richfield, Morton County, Richard and Jean Graber.
No subspecies recognized.
Empidonax difficilis. Western Flycatcher. Known only from two specimens taken eight miles south of Richfield, Morton County; September 3, 1952, immature female, Jean Graber; September 5, 1952, immature male (KU 31203), Richard Graber.
Subspecies in Kansas: E. d. hellmayri Brodkorb (female specimen); intermediate between E. d. hellmayri and E. d. difficilis Baird (male specimen).
* Contopus virens (Linnaeus). Eastern Wood Pewee. Common transient and summer resident in east, rare transient in west. Breeding distribution in state poorly known.
No subspecies recognized.
Contopus richardsonii. Western Wood Pewee. Common transient and probably summer resident in west; rare transient in east (specimen from Greenwood County and one seen in Cloud County). No nesting record.
Subspecies in Kansas: C. r. richardsonii (Swainson).
Nuttallornis borealis (Swainson). Olive-sided Flycatcher. Uncommon transient throughout state.
No subspecies recognized.