Male, female, pupa, larva and egg of a new genus and species of Gracillariidae (Gracillariinae), Spinivalva gaucha Moreira and Vargas from southern Brazil are described and illustrated with the aid of optical and scanning electron microscopy. A preliminary analysis of mitochondrial DNA sequences including members of related lineages is also provided. The immature stages are associated with Passiflora actinia, P. misera and P. suberosa (Passifloraceae), and build mines on the adaxial leaf surface. Initially the mines are serpentine in shape, but later in larval ontogeny become a blotch type. Although the larvae are hypermetamorphic as in other Gracillariidae, there is no sap-feeding instar in S. gaucha; the larva feeds on the palisade parenchyma, thus producing granular frass during all instars. Pupation occurs outside the mine; prior to pupating, the larva excretes numerous bubbles that are placed in rows on the lateral margins of the cocoon external surface. This is the second genus of gracillariid moth described for the Atlantic Rain Forest, and the second gracillariid species known to be associated with Passifloraceae.

Two species of Macaria have been recorded from Chile (^{Bartlett-Calvert, 1893a}, ^1893b; ^{Vargas et al., 2005}). Macaria mirthae Vargas, Parra & Hausmann, 2005 was described from the Atacama Desert, in the northernmost part of the country; its larvae feed on leaves of at least four Fabaceae trees and shrubs, including native species and the invasive Leucaena leucocephala (^{Vargas & Mundaca, 2014}). Macaria alba (^{Bartlett-Calvert, 1893a}, ^1893b) was described from southern Chile, with type locality in Araucanía. It was also recorded in Argentina and Bolivia (^{Scoble and Krüger, 2002}); its host plants remain unknown. Although intrageneric phylogenetic relationships of the species of Macaria have been not explored in detail, the morphology of M. mirthae suggests relationships with the widespread Neotropical Macaria abydata Guenée, [1858] (^{Vargas et al., 2005}). In contrast, M. alba has a distinctive wing pattern (^{Scoble and Krüger, 2002}) and no closely related species have been mentioned.

Se presenta la descripción del adulto, pupa y larva de Angelabella tecomae gen. nov. sp. nov. Los estados inmaduros de A. tecomae se encuentran asociados a Tecoma fulva G. Don (Bignoniaceae) en el valle de Azapa, Primera Región, Chile. Sólo la larva de primer instar se ubica en la epidermis, mientras que las larvas de instares posteriores se ubican en tejidos más internos. La larva de último instar no se alimenta, sólo presenta el espinerete y los palpos labiales desarrollados, mientras que las restantes piezas bucales están ausentes.

Se presentan descripciones de dos nuevas especies de Iridopsis Warren, 1894, del norte de Chile: I. hausmanni sp. nov., del valle de Azapa, Provincia de Arica; e I. parrai sp. nov., de la Pampa del Tamarugal, Provincia de Iquique. Los estados inmaduros de I. parrai se asocian con Prosopis tamarugo Phil. (Fabaceae). Esta es la primera mención de Iridopsis para Chile. Two new species of Iridopsis Warren, 1894, are described from northern Chile: I. hausmanni sp. nov. from the Azapa valley, Arica Province; and I. parrai sp. nov. from Pampa del Tamarugal, Iquique Province. The immature stages of I. parrai are associated with Prosopis tamarugo Phil. (Fabaceae). Photographs of the adults and figures of the male and female genitalia are included. This is the first mention of Iridopsis from Chile

The Neotropical micromoth genus Leurocephala Davis & Mc Kay, 2011 (Lepidoptera, Gracillariidae) was originally described to include only the type species, L. schinusae Davis & Mc Kay, 2011, whose leaf miner larvae are associated with Anacardiaceae in Argentina, Brazil and Paraguay. An integrative analysis including morphology, life history and DNA barcode sequences revealed that specimens collected on Schinus molle L. (Anacardiaceae) in the coastal valleys of the Atacama Desert of northern Chile belong to a second species of this formerly monotypic genus. Adults of Leurocephala chilensis Vargas & Moreira sp. nov. are herein described and illustrated in association with the immature stages and life history, and corresponding phylogenetic relationships are assessed based on DNA barcode sequences. This finding provides the first record of Leurocephala from west of the Andes Range, expanding remarkably its geographic range. It is suggested that the extent of diversity within Leurocephala is much greater and that variation in geographic factors and host plant use may have modeled it, an evolutionary hypothesis that should be assessed in further studies