Caddisfly Species Parapsyche apicalis

Source: Description of the female of Parapsyche cardis Ross (Hydropsychidae: Arctopsychinae) and a revised key to the genera of Hydropsychidae (Trichoptera: Annulipalpia) of the southeastern United States, using wing characters

Wings sub-hyaline, infuscate with light mottling, shape typical for subfamily. Female genitalia (Figs. 24 – 25): Segment IX (IX) in lateral view (Fig. 24) relatively short in its longitudinal dimension throughout its height; anterior margin sinuous; dorsum convex and about 1 / 8 th as long as height of segment IX, produced as prominent bulge; in caudal view (Fig. 25) dorsum with vertex either flat or with distinct medial declivity. In caudal view (Fig. 25), segment IX of nearly uniform width, its sides slightly sinuous. Lateral view with little evidence of articulation between segments IX and X. Segment X (X) only lightly sclerotized. Ventral surface of segment IX with medially converging pair of lightly sclerotized plates, giving “ V-like ” or “ W-like ” appearance to ventral surface, these plates visible in both uncleared and cleared specimens (e. gon. VIII of Nielsen 1980, vulval scale of Nimmo 1987, vulvar scale of Schmid 1998). Pair of elliptical setal patches (sp) mediolaterally on posterior vertical face of dorsum of segment IX, setae in each patch in 2 rows, not convergent apically (Figs. 24 – 26).