Nouvelles données micropaléontologiques(Foraminifères planctoniques et petits Foraminifères benthiques) sur le stratotype de l'Aquitanien

The authors study the microfauna of small benthonic and planktonic Foraminifera from the Aquitanian stratotype and of a few exposures in the stratotype vicinity.Benthonic microfauna is rich: more than 150species have been collected; among them Miliolidae mainly belonging to the genera Quinqueloculina and Miliola.Planktonic Foraminifera are much less abundant:only 20 species. They authorize to place the stratotype at the boundary of N4–N5 Blow's zones.The figurations of many species are made withthe scanning electronic microscope.     

Nouvelles données micropaléontologiques(Foraminifères planctoniques et petits Foraminifères benthiques) sur le stratotype bordelais du Burdigalien

The present work deals with the microfauna of small benthonic and planktonic Foraminifera from the Burdigalian stratotype of Aquitaine basin (France) and from a few outcrops in the stratotype vicinity showing the upper or lower boundary of the stratotype.Benthonic fauna is rich: more than 250 species divided in 92 genera have been collected. The most frequent are hyaline Foraminifera (Pararotalia, Elphidium, Asterigerina, Florilus, Virgulopsis, Bolivina). The miocene feature is more pronounced than in the Aquitanian stratotype.Planktonic Foraminifera are much less abundant:only 20 species. However, some of them authorize to place the stratotype (or its equivalent l. s.) in N5 Blow's zone and perhaps in the basel N6 zone.The figurations of many species are made withthe scanning electronic microscope.     

Contribution à la connaisance des Rotifères et des Cladocères de la Région parisienne

Sans résuméStagiaire de Recherches au Centre de Recherches Hydrobiologiques du C.N.R.S.     

Les conditions de la lutte contre les insectes ravageurs des cultures vivrières africaines

The control measures used against crop pests in countries with technologically advanced agriculture are compared with those found in Black Africa, where other approaches must be envisaged and applied in the concept of integrated control.     

Action de la «densonucléose» de Lépidoptères sur les mammifères

Summary The virus of Densonucleosis ofGalleria mellonella (Lepidoptera) is not virulent for mice and rabbits by inoculation and by feeding. Newly born mice are not contamined by intracerebral inoculation. These data are important for comparison of this virus with some Arthropod born viruses and for biological control.      

Les micrasterias de la région des Trois-Riviéres

Sans résuméLa Pointe-du-Lac, P. Q.     

Essais de cultures de tissus de Lépidoptères sur matières plastiques

Zusammenfassung Es wird auf die M?glichkeit hingewiesen, plastische Kunststoffe für die Kultur von Insektengeweben zu benutzen. Die Entwicklung der Zellen auf Polyvinylchlorid-Folien ist ebenso gut wie auf Glas; es lassen sich auch fixierte und gef?rbte Pr?parate herstellen, und die Kunststoff-Folien lassen sich mit Kanadabalsam zusammenkleben und aufbewahren. Die Vorteile von Kunststoff-Gef?ssen werden hervorgehoben.      

Les progrès de la Géobotanique au cours des dernières années (1938–'46)

Sans résumé     

Les hyménoptères parasites de la mouche des olives I. Les chalcidiens de la région méditerranéenne

Summary In this brief work, authors study the five Chalcidids parasites of the olivefly in the mediterranean zone and discuss the systematic point of view. They modify the generic name (Cyrtoptyx, Pnigalio) and show the existence of the new speciesP. mediterraneus; this name substitutes the other nameE. longulus Zett which was wrongly given to theDacus's parasite. A table has been done for the rapid identification of the five species of Chalcidids.

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Riassunto Nel presente breve lavoro, gli AA. riprendono lo studio dei cinque Calcididi parassiti della mosca delle olive nella zona mediterranea, ne discutono il valore dal punto di vista sistematico, ne modificano la denominazione generica (Cyrtoptyx, Pnigalio) e mettono in evidenza l'esistenza della nuova specieP. mediterraneus, il cui nome sostituisce quello diE. longulus Zett., erroneamente attribuito al parassita delDacus. E'stata compilata una tabella per l'identificazione rapida di queste cinque specie di Calcididi.

     

Effets de la consanguinité sur des caractères morphologiques quantitatifs chez Culex pipiens autogenicus Roub.

The influence of inbreeding on several morphological characters as proboscis, wings, leg and palp segments was examined in strictly inbred lines of C. pipiens autogenicus, starting with females from a natural population. The results show the importance of ccological conditions, especially temperature, during larval development of the population. We report a progressive average size reduction from the second inbred generation. The length variability increases in practically all cases, depending on the degree of inbreeding, which is often more marked in certain organs. The symmetry regulation is strongly affected. We observe highly significant individual values in the highly inbred generations. The distribution values clearly mark a left/right disturbance. The progression of asymmetry as a function of the degree of inbreeding is more marked in certain organs in the two sexes. The results show the importance of the advantage of heterozygotes.