Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 102. (Budapest 2010)
Oláh, J.: New species and new records of Palaearctic Trichoptera in the material of the Hungarian Natural History Museum
102 J. Oláh Diagnosis - This dark species belongs to the species complex with large upward arching triangular gonopods and triangular or bilobed cerci inhabiting the Balkan Mountains. It is closest to Drusus illyricus sp. n., but differs by having ( 1 ) smaller size; (2) upper lobe of the trilobed spinate area on tergite VIII narrow and clearly monolobed, not broad bilobed with some mesal depressen; (3) sternal lateral suture of the fused IX t h segment without middle fork, not with well-developed middle ventral branch; (4) segment IX not very long ventrally; (4) cerci with dorsal lobe short triangular, not long and downward curving; (5) the ventral lobe of the cerci long triangular, not long digitiform; (6) inner branch of paraproct differently shaped both in lateral, dorsal and caudal view. Drusus discolor (RAMBUR, 1842) - Poland: Gorce Mts, Kamienica stream, 26.VI. 1985, singled, leg. J. OLÁH (3 males). - Slovenia: Julian Alp, Radovna stream, 22.VI.1988, singled, leg. J. OLÁH ( 1 male). Drusus discophorus pallidus KUMANSKI, 1988 - Bulgaria: Blagoevgrad province, Rila Mts, Jakoruda, sidebrook of the Ropalica Stream beneath the Gränicar mountain hut, 2100 m, 7.IX.2005, leg. M. FÖLDVÁRI , J. KONTSCHÁN , D. MURÁNYI & T. SZÜTS (l male). Sofia province, Rila Mts, Borovec, spring of the Prava Marica Stream beneath Mt. Zavracica, 2520 m, N42°09.647\ E23°37.270', 8.IX.2005, leg. M. FÖLDVÁRI & D. MURÁNYI (1 male). Sofia province, Rila Mts, Borovec, sidetorrent of Prava Marica Stream beneath Zavracica hut, 2030 m, N42°10.652\ E23°38.438', 13.VIII.2009, leg. D. MURÁNYI (2 males). Drusus franzressli MALICKY, 1974 - Greece: Phocis prefecture, Vargiani, springs and torrent in the village, 970 m, N38°38.499', E22°25.515', 8.IV.2009, leg. L. DÁNYI, J. KONTSCHÁN & D. MURÁNYI (L male). Drusus illyricus sp. n. (Figs 60-62) Description - Male (in alcohol). Dark castaneous; cephalic and thoracic sclerites dark, almost black especially on dorsum; cephalic and thoracic setose warts brown; appendages including legs except coxa and proximal portion of femur lighter brown, haustellum and intersegmental membranous teguments whitish. Spurs of male 1.3.3. Forewing length 14 mm. Male genitalia (Fig. 60). Posterodorsal black spinate area on tergite VIII slightly extended posteriorly, three-lobed, stepped and armed with specialized peg-like setae discernible both in lateral (Fig. 60) and dorsal view (Fig. 61); less pigmented irregularly shaped area of fused setal alveoli located anteriad of black spinate area. Segment IX very long ventrally, very short bridle-like dorsally; its lateral length elongated by rounded triangular lobe anteriad; midlateral sclerotized strips of sternite IX triangular and directed mesad; Annls hist.-nat. Mus. natn. hung. 102, 2010
