TY  - JOUR
TI  - Seven new species of the syrphid genus Sphegina Meigen (Diptera)
T2  - Proceedings of the Biological Society of Washington
VL  - 35
UR  - https://www.biodiversitylibrary.org/part/6694
PB  - Biological Society of Washington
CY  - Washington
PY  - 1922-10-17
SP  - 141
EP  - 144
AU  - Malloch, John Russell,
ER  -