Nirmus fuscus Denny, 1842: 49, 118, pl. 9, fig. 8.
Baja California: Buteo jamaicensis borealis, no date; Falco sparverius peninsularis, no date; Falco peregrinus anatum, no date, J.F. Abbott (Kellogg 1899a).
Note: Specimens of D. fusca were identified by Kellogg (1899a) as “ Nirmus fuscus Nitzsch ”. All three records of D. fusca from the above hosts in Kellogg (1899a) are most likely misidentifactions of D. fulva and D. rufa (see Price et al. 2003).