Acronirmus gracilis (Burmeister, 1838)

Host: Delichon urbicum (Linnaeus, 1758) .

Ref.: Balát (1953, 1955b, 1956, 1977) as Brueelia gracilis; Straka (1987) as Brueelia gracilis; this paper.

Locations: Bojnice, 23 Apr. 1954 (Balát Coll., MMBC slide number 684); Nový Smokovec, 18 Apr. 1955 (Balát 1955a); Martin, 11 Sep. 1980 (Straka Coll., AKMM); Malacky—Vinohrádok, 12 Feb. 2002 (Krištofík Coll., VETUNI).

Note: We follow Gustafsson & Bush (2017: 60) in placing this louse species in the genus Acronirmus .