Abstract The genus Verger Navás 1918 (Trichoptera: Limnephilidae), is a Neotropical genus exclusive to the Andean region, with most of its species distributed from Tierra del Fuego to north central Chile and Argentina. Currently, 20 species of the genus have been described from adults and only six larvae have been associated and diagnosed. The ecology of the species is completely unknown. In this work, we describe and illustrate the immature stages of Verger lutzi (Navás 1918) and study its breeding phenology, larval growth and adult emergence. The main characters that enable the separation of this species are the coloration the body, shape of the anterior ventral apotome, shape and distribution of metanotal setal areas, distribution of tracheal gills and number of accessory teeth in the anal prolegs. Reproduction occurs during the summer and females lay their eggs on the wetland basin formed by humid leaf litter and organic debris, covered by herbaceous vegetation. Larvae hatch after flooding and overwinter in the wetland. Larvae develop fast during spring and emergence begins in December before the wetland dries up. Description of the immature stages is helpful for use of macroinvertebrates biomonitoring, ecological studies and understanding their ecosystem services in seasonal-lentic habitats.

ABSTRACT This article presents a list of Trichoptera species from Calilegua National Park, Jujuy province in Northwestern Argentina. Eighteen species in 7 families and 11 genera are recorded. Nine species were previously cited from Calilegua: Alisotrichia benji Rueda Martín, Hydroptila argentinica Flint, Marilia cinerea Navás, Marilia flexuosa Ulmer, Neotrichia gotera Flint, Oecetis excisa Ulmer, Oecetis knutsoni Flint, Smicridea (Rhyacophylax) pampeana Flint and Smicridea {Rhyacophylax) peruana (Martynov). Nine species are cited newly in the protected area as well as in Jujuy province: Chimarra (Chimarra) argentinica (Ulmer), Grumichella flaveola (Ulmer), Neotrichia falsifera Flint, Oxyethira (Loxotrichia) parce (Edwards & Arnold), Protoptila dubitans Mosely, Protoptila julieta Robertson & Holzenthal, Smicridea (Rhyacophylax) murina McLachlan, Banyallarga (Banyallarga) loxana (Navás) and Banyallarga (Banyallarga) yungensis Flint.

RESUMEN Se presenta una lista de especies de Trichoptera presentes en el Parque Nacional Calilegua, provincia de Jujuy, distribuidas en 7 familias y 11 géneros. Nueve especies fueron previamente citadas en esta área protegida: Alisotrichia benji Rueda Martín, Hydroptila argentinica Flint, Marilia cinerea Navás, Marilia flexuosa Ulmer, Neotrichia gotera Flint, Oecetis excisa Ulmer, Oecetis knutsoni Flint, Smicridea (Rhyacophylax) pampeana Flint y Smicridea (Rhyacophylax) peruana (Martynov). Nueve especies son registradas por primera vez en el parque y en la provincia de Jujuy: Chimarra (Chimarra) argentinica (Ulmer), Grumichella flaveola (Ulmer), Neotrichia falsifera Flint, Oxyethira (Loxotrichia) parce (Edwards & Arnold), Protoptila dubitans Mosely, Protoptila julieta Robertson & Holzenthal, Smicridea (Rhyacophylax) murina McLachlan, Banyallarga (Banyallarga) loxana (Navás) y Banyallarga (Banyallarga) yungensis Flint.

ABSTRACT. The male and the female of a new species of Smicridea (Rhyacophylax) Müller (Hydropsychidae: Smicrideinae) collected near by El Palmar National Park, Entre Ríos Province, Argentina, are described. The males of this species are characterized by the presence of three points at the apex of the phallus, one dorsal and two lateral, and two lateral internal hooks. The females are easily distinguished by the characteristics of the vagina and the internal plate.

RESUMEN. Se describen el macho y la hembra de una especie nueva de Smicridea (Rhyacophylax) Müller (Hydropsychidae: Smicrideinae), recolectados cerca del Parque Nacional El Palmar, provincia de Entre Ríos, Argentina. Los machos se caracterizan por la presencia de tres puntas en el ápice del falo, una dorsal y dos laterales, y dos ganchos internos. La hembras se distinguen fácilmente por las características de la vagina y de la placa interna.

ABSTRACT. Smicridea McLachlan (Trichoptera: Hydropsychidae) is the only genus of the Smicrideinae present in the Neotropical Region. Only two of the 90 species of Trichoptera recorded from Uruguay, belong to the genus Smicridea: Smicridea (Rhyacophylax) atrobasis Flint and Smicridea (Rhyacophylax) dentifera Flint. In this paper, seven species of the subgenus Smicridea (Rhyacophylax) Müller were identified from Uruguay: Smicridea (R.) coronata Flint, Smicridea (R.) discalis Flint, Smicridea (R.) mesembrina (Navás), Smicridea (R.) pampeana Flint, and Smicridea (R.) spinulosa Flint, recorded for the first time from this country; S. (R.) atrobasis; and S. (R.) dentifera, whose distribution is extended to the Paysandú and Salto Departments. Illustrations of the male genitalia of S. (R.) atrobasis, S. (R.) coronata, and S. (R.) mesembrina are provided, as well as morphological characters that were not mentioned before in the males of S. (R.) coronata and S. (R.) spinulosa. A description of the female of S. (R.) coronata, a key for the identification of the males, and distribution maps are provided.

RESUMEN. Smicridea McLachlan (Trichoptera: Hydropsychidae) es el único género de Smicrideinae que se ha encontrado en la región Neotropical. De las 90 especies de tricópteros citadas para el Uruguay, sólo dos pertenecen a Smicridea: Smicridea (Rhyacophylax) atrobasis Flint y Smicridea (Rhyacophylax) dentifera Flint. En el presente trabajo se citan siete especies: Smicridea (R.) coronata Flint, Smicridea (R.) discalis Flint, Smicridea (R.) mesembrina (Navás), Smicridea (R.) pampeana Flint y Smicridea (R.) spinulosa Flint, citadas por primera vez para el Uruguay; S. (R.) atrobasis y S. (R.) dentifera, ampliando su distribución a los departamentos de Paysandú y Salto. Además, se ilustran los genitales masculinos de S. (R.) atrobasis, S. (R.) coronata y S. (R.) mesembrina; se proporcionan caracteres morfológicos encontrados en machos de S. (R.) coronata y S. (R.) spinulosa y se describe la hembra de S. (R.) coronata. Se presentan mapas de distribución y una clave taxonómica para la identificación de los machos basada en el material recolectado.