Four new species of Wing Rolling Neodawnaria (Homoptera : Derbidae) from the Amazon Basin

Four new species of Neidawnaria are described, and compared with other members of the genus. Keys and geographical distribution are given for all nem species and the wings of two other species are illustrated.

Vocalizations of primary forest frog species in the Central Amazon.

The calls of 18 species of Amazonian forest frogs were recorded in 3 localities: the Tapajos National Park near Itaituba, the Reserva Ducke near Manaus, and the INPA-WWF reserves near Manaus. Structural and time parameters and sonographs of these calls including previously undescribed vocalization by 10 species are presented. Unlike open habitat species, several forest frong species characteriscally demonstrated one on more of the following temporal parameters: very low call rates, sporadic intervals, infrequent nights of calling and synchronized chorusing. It is hypothesized that predation has influenced the evolution of vocal behaviour in Amazonian forest frogs.

A new species of Abarema Pittier (Mimosaceae ingeae) from Amazonian Brazil.

Abarema piresii Barneby & Grimes is described from the Brazilian states of Amazonas and Pará. The species is illustrated an tis relationships are discussed. Two kindred species are incidentally transferred from Pithecellobium to Abarema as A. curvicarpa (Irwin) and A. moniliformis (Ducke) Barneby & Grimes.

A new species of Hibiscus from the Amazon basin.

A new species, Hibiscus amazonicus, is described from the Amazon Basin. Characters distinguishing the new species from its nearest relatives presented.

Cyperaceae of Tropical America: some new or critical species III

Discussed are the taxonomy of the Scleria arundinacea-latifoliacomplex, S. mitis, and S. myricocarpa, all controversial and widespread taxa in tropical America. Scleria cerradicola is described as new in the section Hymenolytrum and a range extension of a rare species, Scleria neogranatensis, is noted.

New and interesting species of Justicia(Acanthaceae) from Amazonia

A new Amazonian species of Justicia, J. zarucchii from the region oif the Rio Abacaxis is described, illustrated, and compared with J. schultesii and J. gutierrezii, its closest relatives.

Ficus species of Brazilian Amazonia and the Guianas

In order, to place the new taxa. of Ficus found in Amazonian Brazil and the Guianas (see Vázquez Avila, Berg & Kooy, Acta Amazonica, fallowing article in this volume) in a taxonomic and phytogeographic framework, a key to the taxa provisionally recognized for Amazonia and the Guianas is presented and fallowed by a concise treatment of these taxa.

A new species of Pithecellobiutn (MIMOSACEAE INGEAE) from Brazilian Amazonia

Phithecellobium prancei, related to T. simabifolium Benth. and P. spruceanum Benth., is described and figured from specimens collected on white sand savannas along rio Aracá in northern Amazonas, Brazil. Its relationships within sect. Samanea ser. Coriaceae Benth., a group due for generic segregation from Pithecellobium sens. lat., are discussed.

Lophopidae of the amazon basin with keys to new world genera and species (HOMOPTERA: FULGOROIDEA).

The two especies of Lophopidae found in the lowland Amazon Basin, Hesticus rufimanus, (walker) and H. sanguinifrons Muir, are redescribed and their geographical distributions given. Keys are provided to genera of New World lophopidae, and to species of Hesticus .

Distribution of Atta (Hymenoptera - Formicidae) in "terra-firme" rain forest of Central Amazonia: density, species composition and preliminary results on effects of forest fragmentation

One hundred and fourteen hectares of a "terra-fiirme" rain forest 70 km north of Manaus, Amazonas, Brazil, were surveyed for leaf-cutting ant colonies (Atta spp). One half of this area was in isolated forest fragments (surrounded by pastures or second growth) of two sizes: 1 and 10 ha. The other half was in non-isolated fragments (connected to a large parch of forest) of the same sizes. Only two species occured in this forest: Atta sexdens sexdens L. and A. cepfhalotes L. The first was the most abundant species with a mean density of 0.35 colonies per ha. The mean density of A. cephalotes colonies was 0.03 per ha. The density of colonies was not significantly different between the isolated fragments and the continuous forest. Furthermore, the species composition did not change with isolation. However, pre-isolation data and long term monitoring are necessary to conclude that the isolation of a forest fragment has no effect upon Atta colonies. The non-uniform spatial distribution of Atta colonics within the "terra-firme" forest must be taken into account when selecting conservation areas in the Amazon, in order to preserve this important group of ants together with their native habitat.

Visões do Império : a 1ª EXposição Colonial de 1934 e alguns dos seus álbuns

A Primeira Exposição Colonial Portuguesa realizada no Porto em 1934 foi a consequência visível do impulso que Salazar quis dar à «política colonial» portuguesa e a uma orientação imperial em que colonizar e civilizar as populações indígenas eram as palavras de ordem. Como corolário da exposição foram produzidos, entre outros, dois importantes álbuns, hoje documentos de inegável interesse histórico, não só enquanto discurso de propaganda do regime do Estado Novo, mas também enquanto narrativas visuais ou “visões do Império”. São eles, o Álbum Fotográfico da autoria do fotógrafo Domingos Alvão e o Álbum Comemorativo, com reproduções de pinturas e desenhos do pintor Eduardo Malta. Neste trabalho pretendemos reflectir sobre essas “visões do Império”, pois elas expressam uma visualidade e um imaginário que se traduz em práticas sociais, em valores e em relações de dominação que definem uma política do olhar, onde o corpo se torna um espaço de inscrição, bem como de categorização racial e cultural. Em suma, é através dessas imagens que vemos as relações de poder e as formas de dominação sobre o outro, que impregnaram a exposição.

Transpiration rates for several woody successional species and for a pasture in the upper Amazon basin in Venezuela

Evapotranspiration rates for a eight month old tropical pasture were estimated using the Penman-Monteith equation. Transpiration rates for several woody secondary successional species and stump sprous in the pasture and conucos (farm sites) were measured using the tritiated water technique.The stuty area was located near the village of San Carlos de Rio Negro (1° 56' N, 67° 03' W) in southern Venezuela, near the confluence of the Casiquiare and the Rio Guania wich forms the Rio Negro. The terrain was gently rolling with the areas between the small ridges supporting Amazon caatina forests on spodosols, and higher never flooded areas (tierra firma) supporting a mixed species forest.Results indicated that for a one month period, ET loss (0.46 cm/day) from the pasture, including soil and root mat evaporation, was about 0.43 cm/day less than estimated from the adjacent undisturbed forest (0.89 cm/day). Pan A evaporation for the same time period was 0.64 cm/day. Transpiration rates for seed established species were significantly less (0.38 cm/day) than for stump sprouts (1.09 cm/day) of the primary forest in the pasture.

Brasilian Therevidae (diptera): a checklist and discriptions of species.

95 Specimens representing 12 Species in 5 genera form the basis of this paper. 6 new Species are described, namely: Henicomyia amazonica, n. sp. (Bnazil: Amazonas) , Brachylinga xanthoperra, n. sp. (Brazil:Roraima), Cyclotelus badicrusus, n. sp. (Brazil-.Amazonas; Ecuador: Pichinca), C. silacrusus, n. sp. (Brazil-.São Paulo), Penniverpa alvadusta. n. sp. (Brazil-.Amazonas) and P. alvatra, n. sp. (Brazil-.Roraima) . A check-list of Braziliam Therevidae, based on literature accounts and examined matenial, is ALSO provided. It lists 22 Species in 7 genera, one not formally described. New combinations, and new synonyms ore proposed.

New species and records of Psocoptera (Insecta) from Roraima State, Brazil.

Psocoptera. from Ilha de Marcica and Pacaraima, Roraima State, Brazil, representing 103 species are recorded. Sixty-two are new to science. and are described and figured, representing genera Echmepteryx(2), Tapinella(3), Musapsocus, (1), Seopsocus(3),Isth-mopsocis(3), Dolabellopsocus(6), Epipsocus(5), Neurostigma.(1), Nctiopscus(1), Cae-cilius (6) , Enderluinella (1), Xanthocarcilius(1) , Polypsocus(3) , Scytopsocus(1), ar-chipsocus(1), Lachesilla(4), Notolachesilla(1) , Perispsocus(4), Dactylopsocus (1) , Metylophorus(3), Blaste.(4), Lichenomiae(3), Myopsocus (3). Genus Notarchispsu. gen. is erected for Archipsocus macrurusNew and a new species. Genus MonocladellusEu-derlein in placed in synonymy of, PolypsocusHagen. South American species assigned to genus LophopterygllaEnderlein by New (1979) are. reassigned to Myopscus and represent a parallel development in the latter genus.

A CHECK-LIST ON THE INVASIVE SPECIES OF FORESTRY PLANTATIONS IN LOWER AMAZON, NW.

The work conelete of a survey of the mvaewe plants which appeared during the first six months of seedling stage in foreet plantations of second and third rotation, in the Jari area, Brazil. The resulting list showed two types of invasives: (1) true weeds - those cosmopolitan species that are typical of disturbed habitats; and (2) pioneer species - those which were probably remnants from the original natural vegetation of the studied area.