Reference

S. Rojo, C. Pérez-Banon, M. Angeles Marcos-García (1999): First observations on the biology of Scaeva mecogramma (Bigot, 1860) (Diptera, Syrphidae) and notes on some other syrphids preying on psyllids (Hemiptera, Aphalaridae and Triozidae) – Volucella - Die Schwebfliegen-Zeitschrift – 4: 105 - 111.