Observations sur l'abondance et la spécificité prédatrice de quelques espèces du genre Lestodiplosis Kieffer (Diptera : Cecidomyiidae)

摘要

The density and the repartition of 17 species belonging to the genus Lestodiplosis have been observed in the Center, the East and the North of France. Densities are generally low or very low and the geographic repartitions are irregular. These low abundances cannot be explained, in the majority of the cases, by annual fluctuations. Furthermore, they are not compatible with the predatory specificity which was supposed by some authors.