S. Mahunka szerk.: Folia Entomologica Hungarica 62. (Budapest, 2001)

and Perez (I.e.). Genital dissections: gen. prep. Bálint nos 654, 655, 658-660. Paratypes nos 2-6 will be deposited in MUSM. Distribution —• Geographical: known only from the glacial valleys of the Cordillera Bianca. Spatial: known from high elevations at 3550-4600 m. Temporal: known from January to December (see Lamas & Pérez, 1. c). Etymology — The species is named after Mr. J. Enrique Pérez, who carried out extensive field work in the type locality. Discussion — See below the entry of the next species. Penaincisalia lamasi sp. n. (Figs 3-4, 8) "Thecla" sp. n. 3. ("celeste") — Lamas & Pérez 1983: 35, 36, Fig. 46 [nomen nudum], P. sp. n. "celeste" — Bálint 1997: 12. [nomen nudum]. Diagnosis — There is no similar known congener. The fore wing shape somewhat resembles P. alatus (Druce, 1907) but dorsal ground colour is iridescent azure blue and hind wing ventral postbasal spots and postmedian area is white. Description — Male: head, thorax, abdomen, palpi and fore wing androconial cluster typical of genus. Fore wing dorsal surface fuscous grey with iridescent sky blue anal suffusion; hind wing dorsum iridescent sky blue with fuscous costa and margin; fringes chequered; ventral fore wing ground colour dove grey with discoidal spot, postmedian with lineal markings, submedian with faint blackish line in each cell; hind wing basal area velvet black, postbasal spots in discal cell and in cell Sc+Rl ochreous, medial line moderately ruptive, postmedial area lighter, submargin with small lighter spots and darker crescent in each cell, fringes chequered. Holotype fore wing costal length from base to apex: 9.5 mm. Male genitalia typical of genus (Fig. 8). Female: Unknown. Type locality — Peru, department of Ancash, Parque Nacional Huascarán, Quebrada Demanda, 4700 m. Types — Holotype: male, deposited in MUSM, labelled as "PERU, Dept. Ancash, PN Huascarán, Camino Portachuelo, 4700 m, 10.11.1995, leg. Zs. Bálint". Genital dissection: gen. prep. no. Bálint 650 (holotype). The specimen is in good condition, wings are slightly worn, left antenna is missing, the abdomen is dissected. 1 male paratype, deposited in MUSM, figured by Lamas and Pérez (I.e.). Distribution — Geographical: known only from the glacial stream valleys of Quebradas Ancosh and Demanda of the Cordillera Bianca. Spatial: known from high elevations between 4600—4700 m. Temporal: known from November and February (see Lamas & Pérez, 1. c). Etymology — The species is named after Dr. Gerardo Lamas, who also collected the species and was kind enough to help me in my search for suitable localities for polyommatine lycaenids in Peru. Discussion — When he erected the genus Penaincisalia, Johnson (1990) placed 13 species in two species groups. Two further taxa were later added (Johnson 1992, Constantino & Salazar 1998). However, the nomenclature of Penaincisalia is problematic. After studying BMNH and AMNH materials, including numerous types, I have discovered certain synonyms (Bálint, in prep.). The systematics of the genus is also problematic, as is well demonstrated by the species amatista Dognin, 1895, which is intermediate between Penaincisalia s.str. and Thecloxurina Johnson, 1992 in wingshape, pat-