Trans. N.Z. Inst., Vol. LI II 



Plate LI I. 



2 



Fig. 1. — Par agus pseudo-ropalus n. sp. : adult male, x 4. 



Fig. 2. — Syrphus harrisi n. sp. : adult female. X4 



Fig. 3. —Eristalis tenax larva submerged in water. Magnified. 



