70.076 Hydriomena ruberata (Ruddy Highflyer)
fw: 14-17mm (Waring & Townsend); May-Jun; broad-leaved willows (Salix spp.); local in moors and heaths in N&W Wales, N.England & Scotland
Hydriomena ruberata (Ruddy Highflyer) §1 female
ID: Distinguished from H.furcata (July Highflyer) by flight season and possession of 2-3 short black streaks between the veins near the forewing apex. H.impluviata (May Highflyer) also has these streaks but is never reddish. Greyish forms of H.ruberata are more difficult to distinguish but H.ruberata usually has a short black diagonal dash at the forewing apex which is usually absent in H.impluviata.
Male genitalia: The uncus of H.furcata is notched while that of both H.impluviata and H ruberata is clearly bilobed. In H.impluviata the uncus lobes are of approximately even width throughout their length and the junction of uncus and tegumen has a width of two uncus lobes. In H.ruberata the uncus lobes broaden towards the apex and the junction of uncus and tegumen has a width of the apical portion of one uncus lobe.
Female genitalia: Both H.impluviata and H.ruberata have a strongly sclerotised ductus bursae continuous with a sclerotised lobe projecting from the left side of the posterior end of the corpus bursae; in H.impluviata the anterior end of this sclerotisation is almost transverse, in H.ruberata it is oblique (angled posteriorly to the right from the lobe)
Male genitalia: The uncus of H.furcata is notched while that of both H.impluviata and H ruberata is clearly bilobed. In H.impluviata the uncus lobes are of approximately even width throughout their length and the junction of uncus and tegumen has a width of two uncus lobes. In H.ruberata the uncus lobes broaden towards the apex and the junction of uncus and tegumen has a width of the apical portion of one uncus lobe.
Female genitalia: Both H.impluviata and H.ruberata have a strongly sclerotised ductus bursae continuous with a sclerotised lobe projecting from the left side of the posterior end of the corpus bursae; in H.impluviata the anterior end of this sclerotisation is almost transverse, in H.ruberata it is oblique (angled posteriorly to the right from the lobe)
§1 Abernethy Forest, Perthshire; 24/05/2025; female; fw 15.0mm
§2 Abernethy Forest, Perthshire; 24/05/2025; male; fw 14.7mm
§3 Abernethy Forest, Perthshire; 24/05/2025; male; fw 14.8mm
All images © Chris Lewis
§2 Abernethy Forest, Perthshire; 24/05/2025; male; fw 14.7mm
§3 Abernethy Forest, Perthshire; 24/05/2025; male; fw 14.8mm
All images © Chris Lewis
Page published 17/05/2025 (§1-3)
