Smicridea (Rhyacophylax) aurra Flint 1991

Smicridea (Rhyacophylax) aurra

This species and 5. (R.) argentina (Navás) are closely related as is shown by the possession of similar lobes on the phallus. However, in S. (R.) aurra the tenth tergites are more broadly rounded, and the phallus bears paired, ventrolateral carinae at the apex.

ADULT.—Length of forewing, 5 mm. Width of eye of male in dorsal aspect a bit more than ½ that of interocular distance. Color brown, antennae annulate; forewing golden brown, with darker apical fourth, with inner margin scalloped and a darker marking along chord. Male abdomen with Fifth sternal processes slightly longer than sternum. Male genitalia: Ninth segment with anterior margin produced into an angulate lobe. Tenth tergite tapered apicad in lateral aspect, broadly rounded in dorsal aspect. Clasper with basal segment long, almost parallel-sided; apical segment bluntly pointed. Phallus tubular, base slightly enlarged, with a lightly sclerotized lobe overlying phallotheca at midlength; apex very lightly sclerotized, with a pair of dorsolateral lobes and a central lobe, with elongate ventrolateral carinas; internal sclerite long, threadlike.

MATERIAL.—Holotype, male: COLOMBIA. DPTO. ANTIOQUIA: Río Aurrá, Km 50, E of San Jerónimo, 14 Feb 1983, O.S. Flint, Jr. USNM Type.