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.

Three genera, four species and the phenotype of Blattella germanica are recorded for the frst time from Argentina. The distribution area of 15 species is expanded. The cockroach fauna from Argentina is still poorly known and currently represented by 45 genera and 100 species.

Tres géneros, cuatro especies y el fenotipo de Blattella germanica se registran por primera vez en Argentina. El área de distribución de 15 especies se amplía. La fauna de cucarachas en Argentina actualmente representada por 45 géneros y 100 especies, es aún poco conocida.

Hypercompsa fieberi (Brunner von Wattenwyl, 1865) from Argentina is registered for the first time and the cockroach particular habitat associated with the ant nest of Acromyrmex lundi (Guérin, 1838) is described. All species included in the genus are georeferenced and their distribution is shown in a map.

Se registra por primera vez de la Argentina Hypercompsa fieberi (Brunner von Wattenwyl, 1865) y se describe el hábitat particular de esta cucaracha, asociada al nido de hormigas Acromyrmex lundi (Guérin, 1838). Todas las especies incluidas en el género son georreferenciadas y se muestra su distribución en un mapa..

Last instar larvae and pupae of Protoptila dubitans Mosely, 1939 and P. misionensis Flint, 1972 are described for the first time. They are compared to those of other described species. The diagnostic characters of the larvae are: coloration of sclerites; areas with setae on the pro-, meso- and metanotum; size and shape of sclerites of the meso- and metanotum; setal distribution on the urites. The characters studied of pupae are: chaetotaxy of labrum; mandibles, and hooks on the urotergites.

Se describen por primera vez las larvas del último estadio y las pupas de Protoptila dubitans Mosely, 1939 y de P. misionensis Flint, 1972; y se las compara con otras especies descriptas. Los caracteres diagnósticos de las larvas de estas especies son: la coloración de los escleritos, áreas de pelos del pro-, meso- y metanoto; forma y tamaño de los escleritos del meso- y metanoto, y distribución de pelos en los uritos. Los caracteres estudiados en las pupas son: quetotaxia del labro, mandíbulas, y ganchitos de los uroterguitos.