(Figs. 9–12, 295–298)
Material examind: Ukraine: Kharkiv Region: near Petrivske, 49°10’N, 36°58’E, 10.vii.2020, Yu. Guglya, ex Glyceria maxima (1♀). The rest of material see in Guglya (2020).
Hosts. Poaceae: Phragmites australis (Cav.) Trin. ex Steud. (Spencer 1976). Phalaris L. (Warrington 2021). Glyceria maxima (Hartm.) Holmb. newly recorded host plant.
Mine. (Fig. 9) The solitary larva forms a wide linear leaf mine. Pupation takes place within the mine (according to my own data) or outside the mine with the puparium frequently remaining attached to the leaf (Spencer 1976).
Puparium. (Figs. 10–12) Yellowish-orange, glossy, 3.8 mm long, with deep segmentation; surface quite smooth except for one-row spine bands. Spines are minute and black. Posterior spiracles set flat on the body cuticle, entirely separate; blackish-brown, with three straight orange slits set in a circular configuration at right angles to each other. Anal plate black, not protruding above the surface of the puparium viewed from the side and directed ventrally.
Cephalopharyngeal skeleton. (Fig. 295) Both mouthhooks equal in size, angulate dorsally. Each mouthhook bears three accessory teeth. Intermediate sclerite long and narrow, more weakly sclerotized dorso-posteriorly, 1.13× as long as height of mouthhook. The dorsal cornu bears a narrow and long “closed” window with irregular contours. The pharyngeal sclerite is much more sclerotized anteriorly than the ventral and dorsal cornua. Indentation index 85.
Female head. (Figs. 296, 297) Black, with orbit not projecting above eye in profile, 2 orb s, 3 fr s and low lunule, reaching the level between fr s; pped of medium size, concave ventrally; gena medially 0.16× as high as maximum height of eye.
Female genitalia. (Fig. 298) Spermathecae equal in size, dark brown, flattened basally and with extremely elongated apical triangular portion, 2.3× as high as maximum width. Internal duct invagination 0.15× as deep as height of spermatheca, widening apically. Neck of spermatheca bulbous and narrowing near the spermatheca base.
Distribution. A rarely collected European species recorded from 14 countries (Papp & Černý 2015). In Ukraine known from Transcarpathia, Sumy and Kharkiv Regions (Guglya 2020).