Accepted by C. Prieto: 21 Aug. 2014; published: 11 Sept. 2014 ZOOTAXA ISSN 1175-5326 (print edition) ISSN 1175-5334 (online edition) Copyright © 2014 Magnolia Press Zootaxa 3861 (1): 091–095 www.mapress.com/zootaxa/ Article 91 http://dx.doi.org/10.11646/zootaxa.3861.1.6 http://zoobank.org/urn:lsid:zoobank.org:pub:854CE13E-2873-4440-A5CE-01378047DE53 Psoralis mirnae sp. nov., the first species of the skipper genus from Central America (Lepidoptera: Hesperiidae) RICARDO RUSSO SIEWERT 1 , ICHIRO NAKAMURA 2 & OLAF HERMANN HENDRIK MIELKE 3 1,3 Laboratório de Estudos de Lepidoptera Neotropical, Departamento de Zoologia, Universidade Federal do Paraná, P.O. Box 19.020, ZIP Code 81.531-980, Curitiba, Paraná, Brazil. 2 41 Sunrise Blvd, Williamsville, New York 14221, U. S. A. E-mail: 1 ricardo.siewert@gmail.com; 2 inakamur@buffalo.edu; 3 omhesp@ufpr.br Psoralis Mabille, 1904 (Hesperiinae: Moncini) contains 11 species of skippers distributed throughout South America (Mielke 2004, 2005). According to Evans (1955), Psoralis resembles Lerema Scudder, 1872, in several morphological characters of antennae, palpi, wings and legs, but could be distinguished from the latter by the male genitalia, where the uncus is undivided instead of being quadrifid. This paper describes a new species of Psoralis from Central America, P. mirnae sp. nov., based on specimens collected by the second author (I. Nakamura) in Guatemala. The specimens studied had their abdomen detached, soaked in a heated 10% potassium hydroxide solution for removal of the genitalia to analyze their structures. All illustrations were prepared with the aid of an eye-piece grid or a camera lucida attached to a stereoscopic microscope. The specimens are deposited at Coleção Entomológica Padre Jesus Santiago Moure, Curitiba, Paraná, Brazil (DZUP) and in the second author’s collection. Psoralis mirnae Siewert, Nakamura & Mielke, sp. nov. (Figs 1–12, 17–18) Diagnosis. Psoralis mirnae sp. nov. is similar to other Psoralis species in the spot pattern of both wings, but can be easily distinguished from the others members of the genus by its rufous brown ground color and the yellow patch between CuA 2 –2A on the forewing underside. The male genitalia resemble those of P. degener in the tegumen, uncus and gnathos (Figs 13–16), but differ mainly in the valva and aedeagus. Description. Sexes similar except as noted. Head: Brown; frons densely covered by brown and yellow elongated scales with greenish tinge; antennae shaft brown on upper side, underside similar but with yellow scales at the base of each segment; underside basal half of the club yellow, nudum 12–14 segments (n=8); eye glabrous, brown, surrounded by yellow scaling; labial palpus mixed with brown and yellow scales in the first and second segments, third segment short, conical, dark brown. Thorax: Dorsally dark brown; legs reddish. Forewing (Figs 1–4): Male, length 16–17 mm (average 16.5 mm, n=11), female, length 18 mm (n=1); triangular; costal margin straight; apex rounded; outer margin convex; tornus rounded; inner margin straight. Upper side (Figs 1, 3): ground color dark brown; fringes dark brown with paler outer two thirds; two small apical semi-hyaline spots in R 4 –R 5 and R 5 –M 1 , the latter the larger of the two; three semi-hyaline spots in M 3 –CuA 1 , CuA 1 –CuA 2 and CuA 2 –2A, the first rectangular, the second oblique and elongated, the third opaque, small and yellow; male with tripartite and sagittate black stigma in M 3 –CuA 1 , CuA 1 –CuA 2 and CuA 2 –2A. Underside (Figs 2, 4): costa, apex and external margin rufous brown; similar spots as on the upper side; opaque yellow patch in CuA 2 –2A more extensive than on the upper side; inner margin dark brown. Hind wing (Figs 1–4): Rounded; costal margin convex; apex rounded; external margin rounded, truncated in 2A–3A; inner margin slightly straight towards tornus. Upper side (Figs 1, 3): ground color dark brown; fringes dark brown with lighter tips; small white discal spots in M 1 –M 2 , M 2 –M 3 in some individuals. Underside (Figs 2, 4): ground color rufous brown; anal fold dark brown and inner margin narrowly rufous brown; one rounded white spot in discal cell, but the spot barely visible in the single female; three smaller similar spots in M 1 –M 2 , M 2 –M 3 and M 3 –CuA 1 .