Abstract in English:

Summary In the present paper a new species of Vochysiaceae is described: Vochysia rufescens. Results are documented by the description of the species, by general characteristics and macroscopic description of its wood, and by figures.

Abstract in English:

Summary The present paper is the continuation of a catalogue of foliar venation of plants of the Amazonian flora, dealing with a source of data for ecology and paleobotany, and a set of auxiliary characters in taxonomy. Results indicate that certain differences in the arrangement of vein network, in the number of translucid glands per mm2, and in the gland position along leaflet margin allow the studied species to exclude from other four species belonging to the camptodroma group. A key for comparing specific discrimination among the species of genus Fagara belonging to the camptodroma group of Ettingshausen's vein patterns is presented.

Abstract in English:

Summary In this paper a revision of Convolvulaceae of the State of Amazonas, Brazil, is made. 11 genera with the total of 40 species are studied. Keys for the identification of each genus and each species are shown. Results are documented by general characteristics of family, by short descriptions of each genus and by figures.

Abstract in English:

Summary In this paper one new species of Rutaceae: Rauia prancei is described with one accompaning drawing. This species is distinct from the other by presenting 2 petals with staminodes connected until 2/3 in total lenght and 3 free staminodes and also by anther, disc and stigma shape.

Abstract in English:

Summary In this note, two new species of Styracaceae: Styrax cinerea and Styrax squamulosa are proposed. These species are distinct from other species belonging to the genus by the membranaceous domatias on the dorsal surface of the leaves.

Abstract in English:

Summary In this previous note a new species of Rutaceae is proposed. Principal characteristics of the species, and general characteristics and macroscopic description of its wood are presented.

Abstract in English:

Summary The procedure as used in sampling for quantitative and qualitative studies on litter is described in this first paper. Studies are being carried out in a "terra firme" forest in Central Amazonia. A botanical inventory of the area has proceded sampling.

Abstract in Portuguese:

Resumo No período de 3 a 14 de julho de 1969 a temperatura do ar foi medida em duas altitudes em uma capoeira da Reserva Florestal Ducke, Estrada Manaus - Itacoatiara (Km — 26). Do dia 10 até o dia 13 a temperatura foi influenciada por uma onda fria (friagem) caida no local e cujo desenvolvimento foi observado por satélite (fotografado). No início da friagem, a temperatura baixou nos dois níveis até 15°C voltando após algumas horas a apresentar variações devido ao movimento turbulento das camadas de ar.

Abstract in English:

Abstract A "friagem" is a cold front which moves northward from southern Brazil to the Caribean coast of South America. A set of composite satellite pictures (2) of the American sector of the southern hemisphere as well as the record of daily temperatures in a secondary forest near Manaus are presented. The low temperatures and strong winds associated with this phenomenon have a profound effect on the environment of Amazonia.

Abstract in Portuguese:

Resumo Algumas vêzes não é possível analisar no próprio local amostras d'água com relação aos valores de pH e condutibilidade elétrica, havendo por isso necessidade de posteriores determinações no laboratório. Foram investigadas as possíveis variações em uma série de 4 amostras colhidas em diversas profundidades no Rio Negro, bem como uma série de 4 amostras de diferentes igarapés da mata tropical úmida ao longo da rodovia BR-174 sendo obtidos os seguintes resultados após um período de armazenamento: a) As variações verificadas nas amostras do Rio Negro foram significantes em relação ao período de depósito das mesmas (dois meses). b) As amostras dos igarapés mantiveram-se mais ou menos estáveis durante 30 dias. De acôrdo com os resultados obtidos por outros autores para outras regiões terciárias da Amazônia os valores analíticos mostram a possibilidade de serem elas analisadas depois de um mês desde a data da coleta. c) A natureza da conservação das amostras no laboratório (normal e refrigerador) não mostram variações significativas.

Abstract in English:

Abstract The hypothesis was tested, whether hydrogen — ion concentration and electric conductivity in river water samples of the Tertiary region of central Amazonia were subject to changes in time and due to nature of storag. Over a period of about two months only changes in pH and conductivity of Rio Negro water samples were found to be significant. The total deviation of both parameters in rain forest stream samples v/as considered negligible for at least a period of 30 days, independant of the nature of storage (laboratory or icebox). The latter results may be generalized more or less unconditionally for the entire Tertiary formations of Amazonia.

Abstract in English:

Summary A list is presented of the geographical distribution, by State, of the twelve species of triatomine bugs (Hemiptera, Reduviidae) refered to in the litterature for the Amazon Region of Brazil. Detailed data are given on the six species captured by the Author and other members of the Staff of I.N.P.A. in the State of Amazonas and Territory of Roraima: Panstrongylus geniculatus, P. lignarius, Rhodnius pictipes, R. brethesi, R. robustus and Triatoma maculata. Specimens of the first three species were found naturally infected with flagellates similar to Trypanosoma cruzi.