Apu flavicornis (Druce, 1883) Grados, 2021

Grados, Juan, 2021, Apu, a new genus of Euchromiina (Lepidoptera: Erebidae: Arctiinae: Arctiini), and a new species from the montane forests of southeastern Peru, Revista Chilena de Entomología (Rev. Chil. Entomol.) 47 (3), pp. 639-648 : 644-645

Apu flavicornis (Druce, 1883) comb. nov.

( Figs. 9 -16)

Redescription. Male ( Figs. 9-10 ). Head. Proboscis black. Palpi thin, somewhat curved and can reach the middle of the frontoclypeus. First palpomere black with large piliform scales on the underside. Second palpomere twice the length of the third; both black. Frontoclypeus with brown piliform scales of a greenish hue. Vertex with brown piliform scales. Eye margin and antennal alveolus, brown. Ocellus whitish. Postgena brown. Antennas bipectinate. Scape and pedicel brown. Flagellum yellow. Proximal rami medium, increasing in size towards the middle. Middle rami thrice the length of the flagellum axis. Distal rami decreasing in size towards the distal end. Cervical scales brown. Thorax. Patagia, tegulae, mesoscutum, mesoscutellum, metascutum and metascutellum covered with piliform scales of a bluish-green hue, most pronounced at the posterior part of the tegulae. The three pairs of legs black. Forewing span: 22-23 mm (n = 5). Forewing (dorsal). Elongated and black, with a bluish hue. It presents well-defined transparent areas: a rectangular one in the central part of the discal cell; another one the same length as the previous at the Cu 2 - 1A+2A cell. Five continuous ones: a triangular, elongated and small one in the proximal part of R 5 -M 1; a rectangular and elongated one, subproximal in M 1 -M 2; an elongated one, proximal in M 2 -M 3; a subproximal one in M 3 -Cu 1 and a small subdistal one in Cu 1 -Cu 2. Forewing (ventral). Black and elongated, with the same characteristics as on the dorsal side. Retinaculum brown. Hindwing (dorsal). Black and elongated with a bluish hue all throughout. With three transparent areas: the largest one, proximal in M 1 -M 3; another in the proximal part of M 3 -Cu 1 +Cu 2; and a large, elongated one, subproximal in Cu 2 -1A+2A. Internal margin with piliform scales of a bluish-green hue. Hindwing (ventral). Similar to the dorsal side. Abdomen. Presence of long greenish-blue piliform scales on the first tergite. The rest of the abdomen black with short piliform scales of a greenish hue. Male genitalia (Genitalia # JGA–410, MUSM) ( Figs. 13 -16). Tegumen somewhat narrower than the vinculum, sclerotized, with the anterior margin shaped as an inverted “U”, somewhat more open towards the anterior margin; posterior margin slightly convex towards the central part. Joining of the tegumen and uncus, membranous. Uncus sclerotized; the base bipartite, narrower than the posterior margin of tegumen; setae present on the dorsal and lateral surface of the lobe; fusiform in lateral view. Juxta sclerotized. Transtilla membranous. Valva sclerotized, wide in the proximal half, narrow in its central part; the distal half digitiform and very sclerotized, with setae present in the ventral area; in ventral view, valvae are concave. Aedeagus elongated, narrow, somewhat sinusoidal and smaller than the genital capsule; slightly sclerotized at the proximal two thirds and sclerotized at the distal one; presence of carina penis.

Female. With the same traits as the male, except for shorter rami.

Examined material. SYNTYPES: 1 female, with labels: Calonotos / flavicornis / Type Druce; Type / HT; Type / Sp. figured.; Antioquia / Salmon; Presented by / J.J. Joicey Esq. / Brit. Mum. 1931-444; KB-Dia-Nr./ 432 / B. Kreusel dok.; BMNH (E) 1378941. [Colombia] ( Figs. 11-12 ). ( NHMUK) [examined] . Lectotype designated here. 1 female: Antioquia / L. Salmon; Joicey / Bequest. / Brit. Mus. / 1934-120.; BMNH (E) 1378942. [Colombia]. ( NHMUK) [examined]. Examined additional material: ECUADOR. ZAMORA-CHINCHIPE: 1 male, Zamora, 04°04’N, 78°58’W, 1500 m, ii.1996, M. Büche (diurnal collection) ( MUSM); 1 male: Trichela / flavicornis / Ecuador ; Mssn. / C.; 395. ( ZMHU) [examined]. PERU: AMAZONAS: 3 males, Alto rÍo Nieva , 05°41’S, 77°47’W, 2000 m, 20.xi.1996, M. Jorón (Diurnal Collection) .

Distribution. Known from the type locality ( Colombia), Ecuador and Peru.

Comments. Like Apu mooreorum , the species is diurnal. All specimens were collected in the northern montane forests of Peru with entomological net. For now, both species have an allopatric distribution.

Figures

Figures 9-10. Apu flavicornis (Druce, 1893) comb. nov. (Nieva river). 9-10. 9. Vista dorsal. 10. Vista ventral. Scale: 5 mm. / Apu flavicornis (Druce, 1893) comb. nov. (rÍo Nieva). 9-10. 9. Vista dorsal. 10. Vista ventral. Escala: 5 mm.

Figures 13-14. Apu flavicornis (Druce, 1893) comb. nov. (Genitalia # JGA-710, MUSM). 13. Dorsal view. 14. Ventral view. 15. Lateral view. 16. Aedeagus. Scale: 1 mm. / Apu flavicornis (Druce, 1893) comb. nov. (Genitalia # JGA-710, MUSM). 13-15. 13. Vista dorsal. 14. Vista ventral. 15. Vista lateral. 16. Edeago. Escala: 1 mm.

Figures 11-12. Apu flavicornis (Druce, 1893) comb. nov. Syntype female in NHMUK. 11-12. 11. Dorsal view. 12. Ventral view. / Apu flavicornis (Druce, 1893) comb. nov. Sintipo hembra en NHMUK. 11-12. 11. Vista dorsal. 12. Vista ventral.