Two New Species Of Rhyacophila (Trichoptera, Rhyacophilidae) From Nepal Author Kiss, O. text Acta Zoologica Academiae Scientiarum Hungaricae 2011 57 2 111 116 journal article 10.5281/zenodo.12612287 2064-2474 12612287 Rhyacophila horvathmargiti sp. n. ( Figs 1–5 , 8–9 ) Body length of male 9 mm , forewing length 11 mm , forewing width 3.5 mm, length of antenna 18 mm . Body, antennae, palpi and wings dark brown, abdomen and legs darker brown, genitalia dark brown ( Figs 8–9 ). Male genitalia ( Figs 1–5 , 9 ): Apicodorsal lobe of segment 9 long and stump-like in lateral view, conical in dorsal view ( Figs 1–2 ). Anal sclerite evenly broad, curving upwards, as long as apicodorsal lobe of segment 9 in lateral view ( Fig. 1 ). Apical band claw-like, slender and pointing downwards ( Fig. 1 ). Aedeagus tubular with thin distal part ( Figs 3–5 ). Paramere thin not longer than broad portion of aedeagus ( Figs 4–5 ). Ventral lobe of aedeagus shorter than aedeagus and paramere and it closely adheres to aedeagus ( Figs 4–5 ). Base of first joint of inferior appendages broad, dorsal and ventral edges concave and convex, resp. and of almost the same length as second joint of inferior appendages ( Fig. 1 ). Upper and lower edges of second joint of inferior appendages concave ( Fig. 1 ). Second joint of inferior appendages resembles carving knife. Female . Unknown. Material – Holotype : male, 2 km N of Tarebhir ( 27°23’N , 86°E , 2600 m ), Mt. Kalinchok , Central Nepal , by light trapping, 02.07.1997 , leg. MÁRTON HREBLAY and KRISZTINA CSÁK . Holotype is deposited in Mátra Museum , Gyöngyös , Hungary . Figs 1–3. Rhyacophila horvathmargiti sp. n. male genitalia: 1= lateral view; 2 = apicodorsal lobe of segment 9 and second joint of inferior appendages, dorsal view; 3 = ventral lobe of aedeagus and second joint of inferior appendages, ventral view. (Abbreviations: a.b. = apical band; aed. = aedeagus; a.l. = apicodorsal lobe of segment 9; a.s. = anal sclerite; f.j. = first joint of inferior appendages; s.j. = second joint of inferior appendages) Differential diagnosis: This species is similar to Rhyacophila langdarma SCHMID , 1970 ( Figs 6–7 ) but differs from it in that: – distal end of anal sclerite not broad and not longer than apicodorsal lobe of segment 9 in lateral view; – apical band shorter with curved and pointed apex; – distal part of aedeagus forms tube without slightly bending downwards; – proximal part of second joint of inferior appendages broader with definitely curved dorsal and ventral edges and not subrhomboid. Derivatio nominis: This species is named after my wife MARGIT HORVÁTH . 6 7 Figs 4–7. 4–5 = Rhyacophila horvathmargiti sp. n. male genitalia: 4 = aedeagus, ventral lobe of aedeagus and paramere, ventral view, 5 = aedeagus and paramere, lateral view. 6–7 = Rhyacophila langdarma SCHMID , 1970 male genitalia: 6= lateral view; 7 = male genitalia ventral view. (Abbreviations: aed. = aedeagus; a.l. = apicodorsal lobe; par. = paramere; sa = anal sclerite; sag = sagittal ap- pendages; v.l. = ventral lobe of aedeagus) ( Figs 6–7 by SCHMID 1970 )