June, 1902. CHECK-LIST OF CALIFORNIA BIRDvS 43 



260 (459) Contopus borealis (Swainson) Baird. 



Olive-sided Flycatcher. 



Syn. — Tyr annus borealis; Tyrannus cooperi; Nuttallornis borealis. 



Status — Common summer visitant through Transition and lower Boreal; elsewhere during 

 migfration. 



261 (462) Contopus richardsoni richardsoni (Swainson) Baird. 



Western Wood Pewee. 



vSyn. — Horizopus richardsoni; Tyrannula virens; Contopus virens var. richardsoni; Con- 

 topus richardsoni saturatus. 



Status — Common summer visitant through Upper Sonoran and Transition; elsewhere dur- 

 ing migration. 



262 (464) Empidonax difficilis Baird. 



Western Flycatcher. 



Syn. — Empidonax Jiaviventris; Empidonax insulicola; Empidonax Jlaviventris difficilis. 

 Statds — Abundant summer visitant through Upper Sonoran and Transition west of the 

 Sierras; occurs commonly elsewhere as a migrant. 



263 (464.1) Empidonax cineritius Brewster. 



Saint Lucas Flycatcher. 



Status — Known only from the record by A. W. Anthony of specimens taken in June, 

 1895, on Cuyamaca Peak, San Diego County. 



264 (466) Empidonax trailli trailli (Audubon) Baird. 



Traill Flycatcher. 



Syn. — Empidonax pusillus; Myiobius pusilla; Tyrannula trailli; Empidonax trailli \as. 



ptisillus. 

 Status — Common summer visitant through Upper Sonoran, nesting north through the 



interior valleys to Sacramento and Honey Lake; elsewhere during migration. 



265 (468) Empidonax hammondi (Xantus) Baird. 



Hammond Flycatcher. 



Syn. — lyrannula hammondi. 



Status — Common summer visitant through Transition and lower Boreal along the whole 



length of the Sierras; recorded as breeding from Mount Shasta south to San Jacinto Peak; 



elsewhere during migration. 



266 (469) Empidonax wrighti Baird. 



Wright Flycatcher. 



Syn. — Empidonax obscurus, part. 



Status — Fairly common summer visitant along the Sierras south to Mount Whitney; 

 sparingly elsewhere during migration. 



