168 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
Ficure 18.—RHYNCOTHURA 
a,b, Rhynocothura minuta boliviana, new subspecies: a, Body of male; d, tip of female 
abdomen. 
c, d, R. heterura, new species: c, Body of male; d, male genitalia. 
e-g, R. chacoensis, new species: ¢, Body of male; f, tip of female abdomen; g, male genitalia. 
