Host: Circus cyaneus (Linnaeus, 1766).
Ref.: Balát (1953) as Kelerinirmus fuscus (Denny, 1842); Balát (1956, 1977).
Locations: Bratislava, 13 Dec. 1948; Bratislava—Rača, 26 Jan. 1951; Gabčíkovo, 15 Oct. 1951; Lehnice, 2 Mar. 1952; Šaľa, 28 Jan. 1951; Velký Žitný Ostrov, 4 Jan. 1951 (Balát Coll., MMBC slide numbers 570, 585; 350, 588—not present in the collection, SNMB slide numbers 606, 631); Číčov, 7 Oct. 1951 (Balát 1956).