25. Recognize a monospecific Spodiornis Sclater, 1866

(type = Spodiornis jardinii Sclater, 1866, a junior synonym of Phrygilus rusticus Tschudi, 1844, currently Haplospiza rustica), for Haplospiza rustica (Fig. 4).

Because the name Spodiornis is masculine in gender and Haplospiza is feminine, the ending of adjectival specific epithets changes to agree: H. rustica becomes S. rusticus, H. r. rustica becomes S. r. rusticus, and H. r. arcana (Wetmore & Phelps, 1949) becomes S. r. arcanus (the last as originally described).