Moreover, the chorological knowledge of two iberian endemics: Cheilosia limbicomis (Strobl, 1909) and Pipizella lyneborgi Torp-Pedersen, 1971 and two rare syrphids in Spain: Didea fasciata Macquart,1834 and Cheilosia longula (Zetterstedt, 1838) is extended. Some new data on the pollinical...