ABSTRACT A new species of the leafhopper genus Andanus Linnavuori, 1959 (Hemiptera: Cicadellidae: Deltocephalinae: Athysanini), A. tambopixunensis sp. nov., is described. Materials studied were intercepted using Malaise and light traps in the Tambopata National Reserve (Peru) and the Amazonian Forest (Brazil). The genera Perundanus Zanol, 1993 syn. nov. and Paralaca Lozada, 1998 syn. nov. are recognized as junior synonyms of Andanus based on morphological comparison. The type species of Perundanus and Paralaca, A. raunoi (Zanol, 1993) comb. nov. and A. sordidus (Lozada, 1998) comb. nov., respectively, are transferred to Andanus. A detailed redescription of the genus and illustrations of external and genital morphology are provided as well as a key to the known species. The new species differs from other species in having a pygofer without processes, subgenital plates divergent, and aedeagus with a pair of short dorsoapical and single ventroapical spine. Comparative notes on morphological similarities of Andanus to other Neotropical Athysanini genera are discussed.

Abstract The microleafhoppers, Typhlocybinae (Hemiptera: Cicadellidae), known to inhabit avocado trees in Mexico are reviewed. Leafhopper samples were taken using an entomological aspirator and a sweep net on avocado trees in Michoacán state. Three species, Alconeura cinctella, Empoasca angustella and Joruma sp., are newly reported to feed directly on young avocado leaves. An updated checklist and a key for all known species associated with avocado are provided.

Resumen Las microchicharritas Typhlocybinae (Hemiptera: Cicadellidae), conocidas por habitar árboles de aguacate en México son revisadas. Muestras de chicharritas fueron tomadas usando un aspirador entomológico y una red de barrido sobre árboles de aguacate en el estado de Michoacán. Tres especies, Alconeura cinctella, Empoasca angustella and Joruma sp., son recientemente reportadas por alimentarse directamente de hojas jóvenes de aguacate. Se provee una lista actualizada y una clave para todas las especies conocidas asociadas al aguacate.

ABSTRACT Two nomenclatural changes are proposed in the tribe Athysanini (Cicadellidae: Deltocephalinae). Chlorotettix sexvarus DeLong, 1959, is newly placed in the genus Cocrassana Blocker & Larsen and is a senior synonym of the type species of Cocrassana, C. riepmai Blocker & Larsen, 1991, syn. nov. A revised diagnosis and illustration of the species are provided.