Revision of the chewing louse genus Formicaphagus (Phthiraptera: Philopteridae) from Neotropical antbirds and gnateaters (Aves: Passeriformes)

Examination of specimens of the 15 recognized species of Formicaphagus resulted in 6 new synonomies: F. laemostictus, F. latifrons, and F. peruvianus are junior synonyms of F. picturatus; F. huilae of F. angustifrons; and F. bolivianus and F. thoracicus of F. minutus. Two new species are collected from materal collected by the junior author in Peru: F. arnoldi (type host Conopophaga ardesiaca) and F. donpetersi (type hostConopophaga peruviana); these are the first louse species described from hosts in the family Conophphagidae, the gnateaters. Keys are provided for the identification of the 11 species and host parasite relationships are considered.