Abstract Laccodytes costae sp. nov., from Brazil, is described and illustrated; the new species is the third known member of the Laccodytes apalodes species-group. New records for Brazil: Laccodytes americanus Peschet, 1919, new for the country and Laccodytes rondoniaToledo, Spangler & Balke, 2010, new for the state of Pará. A modified version of the key from Toledo, Spangler & Balke (2010) is provided with new couplets to allow the identification of the new species as well as L. cobreinaeToledo, Megna & Alarie, 2011.

Abstract Six new species of the genus Desmopachria Babington, 1841 are described and illustrated from Brazil: D. anauine sp. nov., D. carranca sp. nov., D. francischettii sp. nov., D. nigrasphera sp. nov., D. nigricoxa sp. nov. and D. yanomami sp. nov. Desmopachria varians is redescribed and illustrated from syntypes photos and material identified by Dr. Frank Young. New records for eight other species from Brazilian states are presented here: D. amyaeMiller, 2001 has a new record from Minas Gerais State, D. grammosticta Braga & Ferreira-Jr., 2015 have new records from Minas Gerais and São Paulo States, D. granoidesYoung, 1986 has a new record from Espirito Santo State, D. laevisSharp, 1882 have new records from Espírito Santo and Parana States, D. leptophallica Braga & Ferreira-Jr., 2014 has a new record from Paraná State, D. sioliYoung, 1980 has a new record from Minas Gerais State, D. striola Sharp, 1887 have new records from Rio de Janeiro and São Paulo States and D. volatidiscaMiller, 2001 has a new record from Paraíba States and an unpublished record of D. challetiMiller, 2001 from Brazil.

A new species of Helochares Mulsant, 1844 (Hydrophilidae: Acidocerinae) from Brazil is described and illustrated. Helochares (s. str.) atlanticus sp. nov. is distinct mainly by characteristics of the aedeagus whose phalobase is short, narrowed on basal third; parameres are thick, constricted on apical quarter, with small tooth-like projection on outer margin near apex; dorsal lobe longer than ventral lobe, shorter than parameres, very wide at base, abruptly narrowing toward apex until about half of its length where it dilates and divides into two long and narrow projections apart from each other at base, but turned inward at apex; ventral lobe acuminate and symmetrical. The rounded emargination on anteromedial margin of labrum bearing small tooth-like projections and the convex and slightly elevated mesoventral process, without high-elevated carina, also helps in identifying the species. Specimens of the new species were collected in the mountain region of the state of Rio de Janeiro (municipality of Teresópolis) and in the north coast of the state of São Paulo (municipality of Ubatuba), both localities in Southeastern Brazil. Helochares (s. str.) oculatus Sharp, 1882 and Helochares (Sindolus) femoratus (Brullé, 1841) are recorded for the first time from the state of Rio de Janeiro.

A larva de terceiro ínstar de M. latus (Fabricius, 1801) é descrita e ilustrada, baseado em espécimes criados da Serra dos Órgãos, Teresópolis, Rio de Janeiro, Brasil. Algumas notas acerca do biótopo onde as larvas foram coletadas são incluídas.

The last instar larva of M. latus (Fabricius, 1801) is described and figured, based on reared specimens from Serra dos Órgãos, Teresópolis, state of Rio de Janeiro, Brazil. Some notes on the biotope are provided.

Neste trabalho é apresentada uma chave dicotômica de identificação de pupas de Simuliidae com registro de ocorrência para o Sudeste do Brasil. Nós incluímos as 49 espécies que apresentam a pupa descrita. Na chave, além de caracteres comumente usados (e.g. número dos filamentos branquiais, forma do ápice e forma do casulo), foram usados caracteres não usuais (largura e comprimento relativos dos filamentos branquiais; disposição espacial das brânquias; proporção entre comprimento da brânquia e comprimento do casulo; presença e posição do assoalho do casulo). É possível diferenciar 70% das espécies de Simuliidae do Sudeste do Brasil usando apenas caracteres da pupa. Este estágio, muitas vezes, é o único do qual se obtém uma identificação precisa.

In this work is given a dichotomic identification key to pupae of Simuliidae recorded from Southeastern Region of Brazil. We included the 49 species which already have their pupae described. In the key, besides characters commonly used (e.g. number of gill filaments, shape of apex and shape of cocoon), we used unusual characters (relative width and length of gill filaments; spacial configuration of gills; proportion of gill length to cocoon length; presence and position of cocoon floor). It is possible to recognize 70% of Simuliidae species from Southeastern Region of Brazil only using pupae characters. Often, this is the unique stage which one can access a precise identification of the species.