Smicridea (Rhyacophylax) magdalenae Flint 1991

Smicridea (Rhyacophylax) magdalenae

This species is closely related to S. (R.) scutellaris Flint and is most easily distinguished by the internal sclerites of the phallus. In S. (R.) scutellaris the internal sclerites of the phallus in dorsal and ventral aspect are united into a V-shaped structure about as long as wide with the point anteriad. In S. (R.) magdalenae these are united into a structure with 2 parallel apical arms and an elongate, rectangular, anterior portion, all being more than twice as long as wide.

ADULT.—Length of forewing, 4–4.5 mm. Width of eye of male in dorsal aspect 1/3 that of interocular distance. Color pale brown; forewing pale brown with darker marks along chord and in a scalloped, subterminal band. Male genitalia: Ninth segment with anterolateral margin produced, not noticeably upturned. Tenth tergite tapering to a narrow lobe in both dorsal and lateral aspects. Clasper with basal segment long and parallel-sided; apical segment long, slender, tip pointed. Phallus with base large, erect, stem about as long as base, slightly sinuous apicad; apex with small dorsolateral lobes, not developed into distinct points; internal sclerites consisting of two parallel apical arms with slight apicoventral hooks, united to a basal sclerite, rectangular in outline, with indistinct, threadlike sclerites anteriad.

MATERIAL.—Holotype, male: COLOMBIA. DPTO. TOLIMA: Armero, near Guyabal, 16–31 Jan 1977, E.L. Peyton, malaise trap #42. USNM Type.

Paratypes: Same data as holotype, 21 15; 2–10 Feb 1977, 97 30. DPTO. ANTIOQUIA: Río Claro [near Río Magdalena on Medellín-Bogotá highway], 3 May 1984, U. Matthias, 2. DPTO. CUNDINAMARCA: Río Sumapaz gorge, E Melgar, 1000 m, 5 Jan 1959, J.F.G. Clarke, 9, 30.