Techniques de préparation des microhyménoptères

Summary The author proposes to standardize the preparation technique for microhymenoptera. The insects have to be presented for identification in a dry state, mounted on a minute pin or glued on a heavy paper point (double-mounting). Preference is given to the mounting on minute pin, as this method has the advantage that a specimen pinned with a minuten may be removed from its support and each morphological detail easily observed. The minuten is fixed to a short strip of soft material such as polyporus (bracket fungus); if this is not available, stiff paper may be used. The support with the pinned specimen is then attached to a pin no. 3 (fig. 1–3). The absence of glue is advantageous, especially in subtropical countries, where the glue is generally destroyed by bacteria and fungi. When the pins are unavailable for this double-mounting technique, the author proposes to glue the thoracic pleurae of the insect to the previously folded tip of a heavy paper point (fig. 6). The material for identification may be preserved in a liquid medium (as alcohol with some drops of glycerine) after a series of individuals have been prepared according to the double-mounting technique. Also, specimens in excess may be sent dry in a plastic or glass tube between two cellucotton masses.      

Production primaire dans les eaux de surface de la Méditerranée occidentale. Calcul de la production journalière

We have found a relationship between the net absorption of carbon at time t divided by the net absorption of carbon in 24 h (A_N(t)/A_N(24)) and the incubation duration after sunrise, in surface waters of the western Mediterranean sea. This ratio is quite similar whatever the sample location, the sample depth and the 24-h net-absorption level. Considering this result, we have established a correction factor which may be used to convert primary production rates obtained from incubation durations ≤ 24 h to daily rates (24 h dawn-to-dawn).     

Synthèse des méthyl-2,4,6-tridésoxy-4-trifluoroacétamido-l-hexopyranosides. Accès à de nouvelles anthracyclines

The four diastereoisomeric methyl 2,4,6-trideoxy-4-trifluoroacetamido-l-hexopyranosides have been synthesized. Coupling of the corresponding 1-O-acetyl-3-O-benzoyl-l-lyxo and 1-O-acetyl-3-O-p-nitrobenzoyl-l-arabino derivatives with daunomycinone in the presence of p-toluensulfonic acid as catalyst afforded two new anthracyclines.     

Le facteur M de mucorinée est-il analogue á l'hormone de division cellulaire des méristèmes (ou á l'hormone réglant la production de matière de ces cellules)?

Sans résumé     

Caractères physico-chimiques des choanoleucocytes de quelques Invertébrés

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.