Smicridea (Rhyacophylax) forcipata Flint 1983

Smicridea (Rhyacophylax) forcipata

This species and S. pallidivittata Flint are closely related. They hardly differ in color or in the form of most of the male genitalia. Smicridea forcipata is slightly larger and bears very different internal sclerites within the apex of the aedeagus.

ADULT.—Length of forewing, 5.5–7 mm. Width of eye of male middorsally that of interocular distance. Color dark brown; forewing dark brown, with obscurely darker bands, a conspicuous narrow, pale transverse band subapically. Anterolateral process of fifth sternum of male slightly longer than sternum; without internal sacs.

Male Genitalia: Ninth tergum with anterolateral lobe rounded. Tenth tergum deeply divided apicomesally; tergite with apex elongate in dorsal and lateral aspects. Clasper with basal segment very long and parallel-sided; apical segment bluntly pointed. Aedeagus with base enlarged and angled to axis of stem, which is broad and slightly inflated apically; with a simple threadlike internal sclerite and ventrolaterally a pair of elongate plates the apices of which are caliper-like.

MATERIAL.—Holotype (male): ARGENTINA, PROV. MISIONES, Arroyo Piray Mini, Rt. 17 W Dos Hermanas, 23 Nov 1973, O.S. Flint, Jr., USNM Type 100534.

Paratypes: Same data as holotype, 1, 4; Arroyo Coatí, 15 km E San José, 18–19 Nov 1973, O.S. Flint, Jr., 9, 10; Misiones (no further data), 13 Nov 1909, P. Jörgensen, 3 (ZSZM).