A catalogue of the American Hesperiidae : indicating the classification and nomenclature adopted in the British Museum (Natural History). Pt. I, Introduction and Group A, Pyrrhopyginae /British Museum (Natural History). Department of Entomology.Evans, William Harry, 1876-textLondon : Printed by order of the Trustees of the British Museum,1951.engx, 92 p,, 9 p of plates : 24 cm.British Museum (Natural History). Department of Entomology. -- Catalogues and collections.Hesperiidae -- United States.Butterflies -- Lepidoptera -- Hesperiidae -- Pyrrhopyginae.Butterflies -- United States.