Insects found in birds' nests from Argentina: Tachycineta leucorrhoa leucorrhoa (Vieillot, 1817) [Aves: Hirundinidae], a new host for Acanthocrios furnarii (Cordero & Vogelsang, 1928) [Hemiptera: Cimicidae]
Nest-boxes used by the White-rumped Swallows, Tachycineta leucorrhoa leucorrhoa (Vieillot, 1817) [Aves: Hirundinidae] were sampled during two consecutive breeding seasons in the province of Buenos Aires, Argentina. A total of 11 taxa of insects were found in the nests of this species: 10 in the order Coleoptera: Coccinellidae [Cycloneda ancoralis; Scymnus sp.]; Cavognathidae [Cavognatha sp.]; Aphodiidae [Aphodius sp.]; Dermestidae [Trogoderma sp.; Dermestes maculatus]; Histeridae [Saprinus sp.]; Carabidae [Notaphus fisheri; Bradycellus sp.]; Elateridae [undetermined sp.]; Undetermined family (larvae), and one in the order Hemiptera: Cimicidae [Acanthocrios furnarii]. These insects were differentiated from prey remains, sometimes entire specimens. The species of Cimicidae appeared in two different nests built in the same box by the same female. The composition of the insect fauna found in swallows’ nests is similar to those in natural birds’ nests from the same province, but the diversity, abundance and richness in swallows’ nests inside boxes were lower.