ABSTRACT The last instar nymph of Talipes appendiculatus (Fonseca) is described and illustrated, and biological data are given on the immatures and adults. The 5th instar nymph has the body covered with tuberculate chalazae; head and thorax without scoli; abdomen with terga III-VIII with single dorsal scoli, all different in size, III and VIII small, V the largest about 2x longer than wide. Descriptions of the adults (male and female) are also provided, with the addition of some new characters. The species (adults, immatures of various stages) has been collected on branches of Cassia fistula L. (Leguminosae: Caesalpinioidea), and is frequently attended by bees and wasps.

Enchenopa luizae sp. nov. (holotype female from Brazil, State of São Paulo, municipality of São José dos Campos, Parque Natural Municipal Augusto Ruschi at 23°04'05°S", 45°56'22"W, 06.VIII.2011, R. La Rosa leg. deposited in DZUP) is described and diagnosed from the Atlantic Forest Vale do Paraíba, São Paulo, Brazil. The new species is very similar to Enchenopa monoceros (Germar, 1821) in overall aspects but much larger and with inconspicuous lateral secondary carinae. The fourth instar nymph is also briefly characterized.

The last-instar nymph of Alcmeone robustus (Butler, 1877) (Membracidae, Darninae, Darnini) is described and illustrated, and some biological and behavioral notes are provided. The nymphs were observed on Pera sp. (Euphorbiaceae) in the locality of Jacareí, state of São Paulo, Brazil, until they became adults. The newly emerged adults, male and female, are also briefly re-described.

Duas espécies são descritas da Mata Atlântica do Estado de São Paulo: uma pertencente ao gênero Antonae Stål (Smiliinae-Ceresini), Antonae brasiliensis sp. nov. e outra a Hypheodana Metcalf (Darninae-Darnini), Hypheodana gargionei sp. nov., ambas de Campos do Jordão, São Paulo. O gênero Antonae é registrado pela primeira vez no Brasil e Hypheodana, por outro lado, para a Mata Atlântica.

Two species are described: one belonging to the genus Antonae Stål (Smiliinae, Ceresini), Antonae brasiliensis sp. nov., and another to Hypheodana Metcalf (Darninae-Darnini), Hypheodana gargionei sp. nov., both from Campos do Jordão, São Paulo. The genus Antonae Stål is recorded for the first time in Brazil, and Hypheodana, on the other hand, in the Atlantic Forest.