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  • 1
    ISSN: 1420-9098
    Keywords: Stenogastrinae ; tegumental glands ; male patrolling ; gastral dispay
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Males ofAnischnogaster laticeps andStenogaster concinna possess clusters of glandular class III cells (Noirot and Quennedey, 1974) under the anterior edge of the 3rd gastral tergite. Their morphology is described with the help of histological sections and SEM investigation.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Resume Le vol en patrouille des mâles de quelques espèces de guêpes Stenogastrinae appartenant au genreLiostenogaster, Metischnogaster etEustenogaster a été observé en nature et en captivité. Les mâles deL. flavolineata effectuent des vols rapides et s'arrêtent sur des perchoirs où ils frottent leurs tergites abdominaux. Les mâles deM. drewseni volent parmi les clairières en allongeant leur abdomen pour montrer des bandes blanches qui sont sur la partie antérieure des tergites abdominaux. Les mâles deEustenogaster sp. volent «en patrouille» sur la végétation et s'arrêtent sur des perchoirs avec leurs abdomens dresses. Les structures anatomiques probablement reliées à la production et la libération de phéromones durant le vol en patrouille, ont été trouvées et décrites dans toutes les espèces examinées.
    Notes: Summary The patrolling flights of the males of some species of Stenogastrine wasps belonging to the generaLiostenogaster, Metischnogaster, andEustenogaster have been observed both in the field and in capivity. The males ofL. flavolineata perform rapid flights stopping on perches where they drag their abdominal tergites. Males ofM. drewseni hover in forest clearings stretching their abdomens every now and then to display whitish bands on the anterior part of their gastral tergites. Males ofEustenogaster sp. hover on vegetation and stop on perches with their abdomens raised. Anatomical structures, probably tied with the production and release of pheromones during the patrolling flights, have been found and are described in all the species examined.
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  • 3
    ISSN: 1420-9098
    Keywords: Key words: Colony foundation, Belonogaster, Polistinae.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: The development of colony foundations of Belonogaster juncea juncea(Fab.) was studied both in the field (Messa quarter, Yaoundé, Cameroun) and in captivity (University of Florence, Italy). Colonies were first initiated by single females who could be joined by other foundresses (2 to 8) coming, in their great majority, from the same maternal colony as the initial foundress female. The co-foundresses remained faithful to one single colony or joined other colonies originating from the same maternal colony and remained, preferentially, on those with the more advanced immature brood. In most cases the nest starter turned out to be the dominant female and her position was usurped in only four cases. Only 25 % of the haplometrotic foundations reached the post-emergence phase while it was reached by 56.7 % of the associative foundations. Only the latter succeeded in producing sexuals. The division of labour between associated females is similar to that observed in other social wasps with dominant individuals who are seldom absent from the nest, lay eggs and perform abdominal vibrations and subordinate individuals that are active foragers. The possibility of a swarming colony foundation in this species is briefly discussed.
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  • 4
    ISSN: 1420-9098
    Keywords: Polybioides ; Ropalidiini ; Polistinae ; caste differences
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Queens ofPolybioides tabidus differ from workers of the same species in the presence of very much longer bristles on the eyes and head and in the size of some morphological characters. The presence/absence of eye bristles in queens/workers of P. tabidus is the first qualitative morphological caste difference reported in the Polistinae.
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