The neotype of anopheles albitarsis (Diptera: culicidae)

Anopheles albitarsis neotype is described from specimens collected in Baradero, Argentina, in Shannon's trap, in horse and pig stables and on the progeny of engorded females. The description includes illustrations of adult female, male and female genitalias, scanning electron miscroscopy of the eggs and complete chaetotaxy of pupa and larva. The importance for electing a neotype is based on the realization that An. albitarsis is a complex of cryptic species. It is an attempt to provide typt-locality specimens with which other memebers of the group can be compared.

Taxonomy and distribution of phlebotomine sandflies in Venezuela: I. The Oswaldoi species group of the genus Lutzomyia (Diptera: Psychodidae)

Species of sandflies in the oswaldoi-group of the genus Lutzomyia occuring in Venezuela are reviewed. A new species, Lutzomyia saccai n. sp. is described. A distribution map and pictorial keys for males and females are provided with notes on biological and ecological data collected in Venezuela.

Description of the adults and pupa of Simulium (Trichodagmia) perplexum, new species (Diptera: Simuliidae)

Simulium perplexum, new species, is described from the male, female and pupa and compared with the closely related S. guianense Wise. The distribution and biology of the new species are discussed. The confusion between S. perpelxum and S. guianense has hitherto prevented accurate identification of the primary vector of human onchocerciasis in highling, hyperendemic areas of the Amazônia focus of Brazil and southern Venezuela.

Lutzomyia reducta Feliciangeli et al., 1988, a host of Leishmania amazonensis, sympatric with two other members of the Flaviscutellata complex in southern Amazonas and Rondônia, Brazil (Diptera: Psychodidae)

A member of the Lutzomyia flaviscutellata complex from Rondônia and southern Amazonas States, Brazil, is so close to the Venezuelan Lutzomyia olmeca recuta Feliciangeli et al., 1988, that it is regarded as belonging to the same species. Since this phlebotomine co-extis with L. olmeca nociva in Brazil, the subspecific status of the former is untenable and is rased to specific rank, as Lutzomyia reducta. The Brazilian material is described and illustrated, and compared with specimens of L. o. nociva and L. flaviscutellata from the same area. Keys to the known taxa of the flaviscutellata complex are presented. Leishmania amazonensis was isolated from one heavily infected specimen of L. reducta, making this the third species of the flaviscutellata complex to be implicated as a vector of this parasite in Brazil. The relative abundance of the three sympatric flaviscutellata complex species varies locally and appears to be related to soil drainage. L. reducta constituted about 25% if all phlebotomines captured in Disney traps at poorly drained and well drained site, but appears not to coloniza areas subject to periodic flooding. L. olmeca nociva was restricted to poorly drained areas not subject to flooding, whereas L. flaviscutellata was ubiquitous L. reducta has never been detected north of the Amazon river in Brazil, but absence of recosrds from western and northwestern Amazonas State may reflect lack of collecting in these areas.

Phlébotomes de Bolivie: VII. Répartition des deux morphotypes du phlébotome lutzomyia longipalpis (Lutz et Neiva, 1912) (Diptera: Psychodidae) dans le piémont andin de Bolivie

Deux morphotypes de Lytzomyia longipalpis (Lutz et Neiva, 1912) ont été décrits au Brésil, l'un avec une seule paire de taches tergales, l'autre avec deux paires de taches. Ce caractère est propre aux mâles. En Bolivie, la forme à une tache existe seule dans le foyer de leishmaniose viscérale des Yungas (alt. 1000-2000 m) dans l'envirionnement péridomicilliaire; c'est le vecteur confirmé de cette maladie. Le second morphotype à deux taches a été récemment découvert sous le porche de grottes dans le région de Cochabamba (alt. 2700 m); il était absent dans et autour des habitations de cette région, où la leishmaniose vicérale est inconnue. Les deux morphotypes de Lu. longipalpis ont, en Bolivie, une distribution allopatrique, et leurs écologies respectives sont très différentes.

Scanning electron microscopy of the antennal sensilla in female Culicoides paraensis (Diptera: Ceratopogonidae)

We studied by sanning electron microscopy the number, types, structure and distribution of the antennal sensilla of the medical important ceratopogonid Culicoides paraensis (Goeldi). There are about 174 sense organs on the antenmal flagellum which are classified as sensilla chaetica; sharp-tipped and blunt-tipped (type I and II) sensilla trichodea; sensilla basiconica; sensilla coeloconica; sensilla ampullacea and styloconic-type sensilla. The role of antennal sensory organs are discussed regarding the host preference of the biting midges.

Three new species of neotropical Sarcophagidae (Diptera)

Three new species of Neotropical Sarcophagidae are described. Miltogrammatinae: Oebalia costarica sp. n (Costa Rica) and Senotainia trifida sp. n. (Chile), of which the latter is the first representative of the subfamily with a tripartite phallotreme. Sarcophaginae: Johnsonia woodorum sp. n. (Costa Rica, Panama).

Morphology of the EGG of Sarcodexia lambens (Diptera: sarcophagidae)

The egg of Sarcodexia lambens (Diptera: Sarcophagidae) is described on the basis of scanning electron microscopy.

Anopheles (Nyssorhynchus) deaneorum: a new species in the albitarsis complex (Diptera: culicidae)

Anopheles (Nyssorhynchus) deaneorum sp. n. is described from specimens collected in Guajará-Mirim, Rondônia state and Rio Branco, Acre state, Brazil, on human and animal baits, inside dwellings and from the progenies of engorged females. A detailed description of the shape of egg, external appearance of adult female and male, genitalias, female cibarial armature and complete chaetotaxy of pupa and larva show that it can be distinguished from Anopheles albitarsis from the type-locality and other areas by the paler general external appearance of the adult, the posterolateral tufts of scales, on the female abdominal terga and the branching of the outer anterior clypeal seta (3-C) of the fourth instar larva (as shown in illustrations). If species can also be distinguished from An. albitarsis from the type locality by the allele frequencies at 11 enzymic loci as represented by Nei's Genetic Distance.

Taxonomy and distribution of phlebotomine sandflies in Venezuela: II. The subgenus Trichopygomyia of the genus Lutzomyia (Diptera: Psychodidae)

Species of sandflies in the subgenuys Trichopygomyia of the genus Lutzomyia occurring in Venezuela are reviewd. A new species, Lutzomyia pinna n. sp. is described. A distribution map and a pictorial key for maleds are provided with remarks on the ecological data collected in Venezuela.

Nova concepção para o método de Baermann-Moraes-Coutinho na pesquisa de larvas de nematódeos

As adaptações por nós introduzidas no método de Baermann-Moraes-Coutinho proporcionaram maior operacionalidade, economia de material e de espaço físico, facilitando sua execução, principalmente nos trabalhos de campo. A sensibilidade do método adaptado, objetivando o encontro de larvas de Strongyloides stercoralis foi, em números relativos, 2,8% maior do que o método original e 6,5% do que o de Lutz