Ozirhincus millefolii (Wachtl, 1884)

Fjellberg, Arne & Fedotova, Zoya, 2024, New records of gall midges (Diptera, Cecidomyiidae) from Norway, Norwegian Journal of Entomology 71, pp. 8-94 : 87

Ozirhincus millefolii (Wachtl, 1884)

( Figure 55 C–D )

Material: TEI, Notodden: Nystul , 59.55068°N 9.13674°E ± 50m, 21 August 2019, L, leg . AF, coll. Private; VE, Larvik: Oddanesand , 58.96947°N 9.85008°E ± 20m, 18 August 2019, L, leg . AF, coll. Private; Faerder: Tjøme, Grepan , 59.06377°N 10.41484°E ± 20m, 23 August 2019, L, leg . AF, coll. Private; Ø, Hvaler: Skipstadkilen , 59.04770°N 10.94045°E ± 20m, 2 September 2919, L, leg . AF, coll. Private; AK, Frogn: Kaholmene , 59.675784°N 10.605837°E ± 360m, 11 July 2019, MF, leg . HE, BOLD: NHMO- ENT-548178, coll. NHMO; Oslo: Gressholmen , 59.884464°N 10.721112°E ± 200m, 3 May 2019, MF, leg . HE, coll. NHMO; SFI, Aurland: Flåm , 60.857940°N 7.110750°E ± 1000m, 22-23 June 2019, 3L, leg . ZF & AK, coll. NHMO.

Biology: The yellow larvae develop singly in

achenes of Achillea spp. Our records are from A. millefolium ( Asteraceae ). The infected achenes are strongly swollen, but the capitulum as a whole shows no outward sign of damage. Bi- or multivoltine. Pupation and hibernation in the gall.

Distribution: Widespread Palearctic, including Norway and Denmark. Introduced to the Nearctic.

Figures

FIGURE 55. A–B. Ozirhincus hungaricus. A. Larvae in galled achenes of Tanacetum vulgare. B. Female. C–D. Ozirhincus millefolii. C. Male. D. Female. Photos: H. Elven.