Tyrannidae sp.

Material. USNM PAL 641993, r tarsometatarsus: distal extremity lacking trochlea metatarsi IV, with shaft extending to just proximal of fossa metatarsi I, collected in the 1990s. The bone appears fully adult.

Description. The fossil closely resembles but is somewhat more gracile than Sayornis phoebe . I consider it to be undiagnostic at the genus and species level.