Tetralidia viracocha sp. nov.

(Figs 12–22, 25–26)

Diagnosis. Subgenital plates, in ventral view (Fig. 17), strongly narrowed at apical two-thirds; connective (Fig. 19) Y-shaped; aedeagus (Figs 21–22) with two pairs of lamellae on shaft, one lateroventral and one laterodorsal preapical; anal tube (Fig. 16) with basiventral processes strongly curved posteriorly.

Measurements (mm). Male holotype: total length 7.2; crown median length 0.75; transocular width 1.41; interocular width 0.87; pronotum median length 0.65; width between humeri 1.67; mesonotum median length 1.31; mesonotum maximum width 1.25; forewing length 6.3; forewing maximum width 1.75.

General color. Body (Figs 25–26) with ground color pale yellow. Crown (Figs. 12, 25) with two pairs of orange maculae, maculae of anterior pair subtriangular close to anterior margin, and other pair of maculae at basal half, subquadrangular, adjacent to compound eyes. Frons (Fig. 13) without maculae. Pronotum (Figs 12, 14, 25–26) yellow, without stripes. Forewings (Figs 15, 25–26) yellowish and hyaline, without maculae. Legs yellow (Fig. 26), with concolorous setae.

External morphology. External morphological characters as in generic description, except: forewing (Figs 15, 25–26) about 3.6 times longer than maximum width; venation weakly visible, except apically.

Male terminalia. Pygofer (Fig. 16), in lateral view, produced; each lobe higher than long; posterior margin straight; apex rounded with few microsetae. Subgenital plates, in ventral view (Fig. 17), with basal four-fifths fused; enlarged at base and strongly narrowed towards apex; ventral surface with few preapical setae; apices rounded; in lateral view (Fig. 18), approximately as long as the pygofer; not curved dorsally; dorsal margin with numerous setae on basal third. Connective (Fig. 19) Y-shaped; approximately two-thirds length of styles; arms as long as shaft. Styles (Figs 19–20) without preapical lobe; apex sclerotized and strongly truncated, moderately curved ventrally; with setae on ventral preapical portion. Aedeagus (Figs 21–22) long and narrow; shaft slightly sinuous with two pairs of lamellae, one longer lateroventral and one shorter laterodorsal preapical; apex with dorsal surface concave and curved ventrally; preapical gonopore. Anal tube (Fig. 16) membranous, with pair of elongated basiventral processes strongly curved posteriorly.

Female unknown.

Etymology. The new species epithet alludes to creator god of Inca mythology.

Material examined. Male holotype: “ PERU: Cusco 3rd km E\ Quincemil 13°13’03”S \ 70°43’40”W, 633m \ 20.viii-01.ix.2012, Malaise\ R.R. Cavichioli; J.A. Rafael; A.P.M. Santos & D.M. Takiya” (MUSM).

Notes. Tetralidia viracocha sp. nov. is similar to T. admirabilis Marques-Costa & Cavichioli 2008, in having the subgenital plates enlarged at the base and strongly tapering towards the apex and the styles with truncated apices. However, it can be easily distinguished from this and other species of the genus by the aedeagus with two pairs of lamellae on the shaft and the anal tube with basiventral processes strongly curved posteriorly.

Acknowledgements. We would like to thank Chris Dietrich (Illinois Natural History Survey) and an anonymous reviewer that kindly made improvements to a preliminary version of this manuscript. Field excursions to Peru were funded in 2012 by a PROTAX grant from Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, proc. 562.303/2010-3) awarded to Dr. Daniela Takiya (UFRJ). Invaluable assistance on permit issuance and field work was given by Juan Grados, Carlos Peña (MUSM), Angelico Asenjo, and Gabriel Melo (UFPR). The first author has a doctoral fellowship from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES).