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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Insectes sociaux 17 (1970), S. 1-10 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung In natürlichen Kolonien vonBombus agrorum undB. hortorum ging der Bau des ersten Brutklumpens dem des Honignapfes voraus. In diesen, und anderen Arten, wurden keine richtigen Waschseizellen gebaut, aber es wurden charakteristische wachsbedeckte Brutklumpen, welche die Eier und den Pollen enthalten, angelegt. In natürlichen Kolonien vonB. agrorum, B. humilis, B. pratorum undB. hortorum wurden die Eier des ersten Brutklumpens in vertikaler Position gelegt.B. hortorum Königinnen legten ihre Eier in den Pollenklumpen, während inB. agrorum, B. humilis undB. pratorum die Eier dem Pollenklumpen angelegt wurden. In laborgezüchteten Kolonien wurden die Eier horizontal und oft in richtige Wachseizellen gelegt. Die Reihenfolge der Nestanlage in gefangengehaltenen Königinnen entsprach nicht immer den Beobachtungen an Kolonien derselben Arten in der Natur. NatürlicheB. agrorum undB. humilis Kolonien hatten eine typische Anordnung von 8 Eiern. Larven oder Puppen in eine mittlere Reihe von 2, und zwei seitliche Reihen von je 3 Individuen.B. hortorum war produktiver, gewöhnlich mit 11–16 Individuen in einem Klumpen, aber es konnte keine bestimmte Anordnung der Eier, Larven oder Puppen innerhalb des Brutklumpens festgelegt werden. Keine der Arten wies eine hone Sterblichkeitsrate in der Entwicklung der ersten Brut auf.
    Notes: Summary In wild colonies ofBombus agrorum andB. hortorum initiation of the incipient brood clump preceded that of the honey-pot. In these, and other species, actual wax egg cells were not constructed but characteristic waxcovered brood clumps, containing eggs and pollen, were produced. Eggs of the first brood batch in natural colonies ofB. agrorum, B. humilis, B. pratorum andB. hortorum were deposited vertically.B. hortorum queens laid their eggs within the pollen lump, but inB. agrorum, B. humilis andB. pratorum, eggs were deposited against the pollen lump. In laboratory-initiated colonies, eggs were laid horizontally, often in actual wax egg cells. The order of colony initiation by captive queens did not always conform to that observed for the same species in the wild. In naturalB. agrorum andB. humilis colonies the arrangement of 8 eggs, larvae or pupae into a central row of 2 individuals, and two lateral rows of 3 individuals each, was typical.B. hortorum was more prolific, there usually being from 11 to 16 individuals in a brood clump, but no definite arrangement of eggs, larvae or pupae within brood clumps of this species was established. High brood mortality rates were not characteristic of the incipient stages of colony development in any species.
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Insectes sociaux 17 (1970), S. 49-81 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé La fourmi fileuse,Polyrhachis simplex, qui appartient en Inde à une faune tropicale, se rencontre en Israël dans une région désertique correspondant à la limite occidentale de son extension. La biologie de cette espèce présente un certain nombre de caractères intéressants: 1 Le filage tient une place de premier ordre dans la vie de la colonie. Les ouvrières construisent les nids à l'aide de la soie sécrétée par les larves et en conséquence les glandes séricigènes de ces dernières sont très développées. 2 Des Aphidiens de plusieurs espèces sont visitées par les ouvrières qui trouvent dans le miellat une source importante de nourriture. 3 Une migration saisonnière verticale a lieu deux fois par an, en hiver et à la fin du printemps. 4 Des «cimetières» sont constitués par les fourmis à des distances considérables des nids afin d'y déposer les cadavres. Un seul «cimetière» peut être utilisé par plusieurs colonies bien séparées. Au cours de cette étude, il a été possible, pour la première fois, d'élever des colonies de cette espèce au laboratoire en utilisant une solution de sucre particulière au lieu de la nourriture naturelle. Les colonies élevées au laboratoire se développaient normalement, maintenaient leur activité journalière (y compris le filage) et se sont reproduites durant plusieurs générations.
    Notes: Summary The Weaver Ant,Polyrhachis simplex, which in India belongs to a tropical fauna, occurs in Israel in a circumscribed desert region which comprises the western limit of its spread. The biology ofP. simplex features a number of highly interesting phenomena: 1. Weaving occupies a central position in the life of the colony. The workers construct the nests with the aid of silk secreted by the larvae. The silk glands of the larva are consequently highly developed. 2. Aphids of several species are visited by the weaver ant for their honeydew, which constitutes a primary food source for the ant. 3. Seasonal vertical migration of the ants occurs twice a year-in the winter and in the late spring. 4. «Cemeteries» are marked off by the ants at considerable distances from the nests, for the purpose of disposing of their dead. A single «cemetery» may sarve several widely-separated ant colonies. The present investigation is the first in which colonies ofP. simplex have been successfully reared in the laboratory, using a special sugar solution as a substitute for the natural food of the ants. The laboratory-reared colonies developed normally, maintained the usual daily activities (including weaving) and reproduced through several generations.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Insectes sociaux 17 (1970), S. 125-126 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Insectes sociaux 17 (1970), S. 39-47 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary Sifolinia kabylica is a new species in the algerian fauna of ants which was discovered while breedingMyrmica aloba. S. kabylica alludes to the genusMyrmica by the wing nervation and the existence of reduced spurs on the middle and hind tibia.
    Abstract: Riassunto Sifolinia kabylica e una nova specie della myrmecofauna algeriana que fu rivelata durante l'allevamento deMyrmica aloba. S. kabylica rievoca il generoMyrmica per la nervatura delle ali e la présènza di sproni ridotti a le tibie II e III.
    Notes: Résumé Sifolinia kabylica est une nouvelle espèce de la myrmécofaune algérienne, qui a été découverte en faisant l'élevage deMyrmica aloba (Forel).S. kabylica se rapproche du genreMyrmica par la nervation des ailes et l'existence d'éperons réduits aux tibias II et III.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Insectes sociaux 17 (1970), S. 113-120 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary A field study of colonies ofNasutitermes costalis in a montane rain forest in Puerto Rico indicated that third stage large workers returned much more readily to nest surfaces to make repairs following a breaching disturbance than other worker types. Where no recent disturbance had been (or was an hour past) small workers, constituting (presumably) only about 24% of all workers in a nest, composed over 46% of the workers collected at the construction site. These findings are evidence of polyethism within theN. costalis worker caste.
    Notes: Résumé Une étude sur le terrain de colonies deNasutitermes costalis, dans une forêt humide d'altitude à Porto Rico, montre que les grands ouvriers du troisième stade retournent beaucoup plus facilement à la surface du nid que les autres, afin d'y effectuer des réparations à la suite d'une démolition. Quand il n'y a pas eu de perturbations récentes (ou après un délai d'une heure), les petits ouvriers constituant, sans doute, 24% de la population des ouvriers du nid, se trouvent sur la surface dans la proportion de 46% an lieu de construction. Ces résultats mettent en évidence le polyéthisme à l'intérieur de la caste des ouvriers deN. costalis.
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  • 6
    Electronic Resource
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    Springer
    Pure and applied geophysics 78 (1970), S. 18-20 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary If the inadequacies of the classical ocean tide theory are acknowledged, it is appropriate to seek modifications of the usual formulation with a view to calculations in better agreement with the behavior of the observed heights. One long-standing objection is the total neglect of the horizontal components of fluid forces. By considering the total forces acting on the entire ‘tidal layer’ in the same manner that is customary in the so-called momentum integral analysis of viscous boundary layers, it is shown that horizontal forces account for a tidal distortion identical to that usually attributed to the vertical forces. An interesting feature of the calculation is that results are obtained from the force balance directly, without the standard but somewhat obscure integration that is employed when the vertical forces are studied.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 78 (1970), S. 48-57 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A study is made of the scattered field which results when a Love wave is incident on a layer having an irregular surface. It is shown that for the class of boundaries treated the scattered field may be described by the superposition of a finite number of Love waves. As an illustrative example the result is applied to determine the reflection from a triangular notch.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 78 (1970), S. 78-85 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The transform calculus has been applied to investigate the disturbances in a composite piezoelectric media traversed by a magnetic field.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 78 (1970), S. 86-95 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The problem of unsteady hydromagnetic flow in a porous annulus when the inner boundary starts moving from rest with a constant longitudinal velocity is considered. For the case of equal Reynolds number and magnetic Reynolds number Laplace transforms of the solutions for the axial components of velocity and magnetic field are obtained in terms of modified Bessel functions. The inversions are effected for the cases of very large and small Reynolds number when the pressure gradient vanishes.
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 81 (1970), S. 76-85 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary In this paper the torsional vibrations of a semi-infinite circular cylinder of nonhomogeneous material, when there is a periodic shearing force prescribed on the plane end, has been discussed.
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