Hydropsyche obscura Navás 1928

= H. atlanta Botosaneanu 1975; synonymized by Malicky 2005.

The larva of this species has been described and diagnosed by Bemmoussat et al. (2021) and Dakki & Tachet (1987).

Algerian literature records. Chelif Basin, Ain Defla, Chorfa Wadi, upstream of Djendel; Chelif Basin, Relizane, downstream of Jdiouia (Arab 2004). Blida, Chiffa, Chiffa Wadi; Mazafran Watershed, upstream of El Affroun, Djer Wadi; Medea, Tamezghida, Mouzaia Wadi; Mazafran Watershed, El Hamdania, Chiffa and Sidi Si Baahloul Wadis (Arab 2004). Great Kabylia, Djurdjura Mountains, Tizi Ouzou (Sekhi et al. 2016). Tafna Watershed, Tlemcen, Chouly Wadi at Beny Ghazly (Bemmoussat et al. 2021) .

International literature records. MOROCCO (Ajakane 1988; Bouzidi 1989; Hajji et al. 2013; Lamri et al. 2016a, 2016b; Mabrouki et al. 2020).

Material studied. ALGERIA, Blida, Hammam Melouane, Badour Wadi (S8) (36°28’43”N, 3°04’07”E) , 410 m a.s.l.: 22.iii.2013, 1 larva; 07.vi.2013, 1 larva (CSK24). Hammam Melouane, Seghir Wadi (S6) (36°28’52”N, 3°03’00”E) , 300 m a.s.l.: 22.ii.2013, 4 larvae; 22.iii.2013, 9 larvae; 25.iv.2013, 1 larva (CSK25) .

Distribution. Algeria and Morocco.

Comment. In Algeria, this north African endemic species was collected for the first time in the study area (Fig. 3), expanding its distribution in the country.