Empidonax fulvifrons fusciceps Nelson, 1904
| Descriptions of new birds from southern Mexico E W Nelson (1903) Proceedings of The Biological Society of Washington 16: 151-159 | |
| Catalogue of birds of the Americas and the adjacent islands in Field Museum of Natural History. 5. Tyrannidae Charles B Hellmayer (1927) Publication. Field Museum of Natural History. Zoological series 13(5): 1-523 |