the relationship between female oviposition preference and offspring performance is a key area of study on the evolution of host specificity. this study investigates host prefer-ence of the polyphagous hover fly syrphus ribesii (diptera: syrphidae) and compares it with some components of its offspring`s performance. females and offspring were tested on six naturally used aphid hosts (blackberry...

El sírfido Parhelophilus crococoronatus Reemer, 2000 (Syrphidae: Eristalinae) estaba registrado de Francia y Portugal. En este trabajo, se documenta, por primera vez, España. la provincia Murcia, el hábitat donde esta especie ha capturado es Embalse Risca, constituido valles forestales arbolados recientemente inundados, con matorrales en descomposición árboles muertos, viven las larvas acuática...

This study highlights the potential of urban dry grasslands for diverse pollinator communities wild bees and hoverflies, including rare endangered species. By using pan trap sampling on 49 sites distributed across environment, responses bee hoverfly to features at two spatial scales (urban matrix local habitat) were examined. A total 1246 individuals (Syrphidae) from 31 species 1463 (Apoidea) 1...

We record Aristosyrphus carpenteri (Hull, 1945) for the first time from South America. This species was previously known Panama and Costa Rica. New specimens, collected in Pichincha Province of Ecuador, represent reported occurrence this flower fly genus country. Images, diagnosis, DNA barcodes are provided to help with identification species.