a b s t r a c t coriander Coriandrum sativum l. (apiaceae) is a year-round condiment and aromatic mediterranean plant. it is cultivated in several countries in north africa, in europe, and western asia. in the el harrach area of algiers, the insect fauna visiting crop flowers includes diptera (syrphidae), coleoptera, and hymenoptera such as chrysididae, vespoidea, and apoidea (Bees). the latter super-family comprises the majority of insect pollinators. visiting bees belong to four families: apidae, andrenidae, halictidae, and colletidae. the main visitors are honeybees and six species of andrenidae: Andrena flavipes, Andrena thoracica, Andrena lagopus, Andrena bimaculata, Andrena discors, and Andrena cinerea elliptica. The three species Andrena lagopus, Andrena bimaculata, and Andrena cinerea elliptica have 100% pollinating visits while Apis mellifera has only 63%. Andrena cinerea elliptica is the most frequent and the most abundant species.

Eight bee species were observed. The wild bee Eucera numida Lepeletier and the honey bee Apis mellifera L. were the most abundant pollinators. Eucera numida seems the most effective pollinator. Their visits are all able to fertilize the fl owers. On the contrary, a third of the fl oral visits of the honey bee are "nectar robbery" through the holes made by the bumblebees at the base of the corolla. The fl oral visits of Eucera numida are also faster (m = 10 visits per minute) and the bee trips more easily the faba bean fl owers than A. mellifera. The plants that are accessible to pollinators provide more pods per plant, more seeds per pods, and the seeds are heavier and of better shape than the encaged plants. Résumé. Les insectes pollinisateurs des cultures de

Morphological distinction between two sympatric species: Phlebotomus perniciosus and Phlebotomus longicuspis (Diptera: Psychodidae). In this article we present a new approach for the distinction of two sympatric species of Phlebotomus vectors of visceral leishmaniasis due to Leishmania infantum in Algeria. In countries around the Mediterranean Sea, Phlebotomus perniciosus Newstead 1911 revealed the existence of atypic morphes which cause erroneous identifi cations wihich consequently can lead to confusions with the closely similar species Phlebotomus longicuspis Nitzulescu 1930. We used the morphological criteria of identifi cation as a fi rst approach on morphological variation of these species. Besides the genital characteristics, the numbers of median coxite were included. This approach allows determining the existence of particular morphological types of Phlebotomus perniciosus in the investigated areas. Résumé. Nous rapportons les résultats sur la distinction entre deux espèces sympatriques du genre Phlebotomus, vecteurs de la leishmaniose viscérale à Leishmania infantum en Algérie. Dans les pays circum mediterranéen, Phlebotomus perniciosus Newstead 1911 a révélé l'existence de morphes atypiques qui sont à l'origine d'erreurs d'identifi cation et par conséquent d'une confusion avec l'espèce voisine Phlebotomus longicuspis Nitzulescu 1930. Nous avons utilisé les critères morphologiques comme une première approche sur les variations morphologiques de ces espèces. L'identifi cation repose, outre les caractères des appareils génitaux, sur le dénombrement des soies médianes des coxites qui permettent de déterminer l'existence de morphotypes particuliers de Phlebotomus perniciosus dans les localités prospectées.

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