FIGURES 13-17. 13-16 Tyranniphilopterus polioptilus n in Tyranniphilopterus polioptilus new species (Phthiraptera: Ischnocera: Philopteridae) parasitic on the Masked Gnatcatcher, Polioptila dumicola (Passeriformes, Polioptilidae) in Argentina

FIGURES 13-17. 13-16 Tyranniphilopterus polioptilus n.sp., eggs, lacking operculum: 13 egg glued to an auricular feather (lateral view); 14 ídem, glued to a throat feather; 15 detail of Fig. 13, showing the type of cementation to a barb; 16 amphora in semipolar view; 17 Polioptila dumicola dumicola, a female specimen from General Mansilla, Buenos Aires Province, showing the egg-laying sites (for further explanations, see text).