Zoology. 



Platychirus angustatus, Ztt. Bexley, Thames Marshes ; common 

 in the Marshes. 



Platychirus fulviventris, Mcq. Thames Marshes. 



Platychirus sticticus, Mg. Eltham. 



Pyrophaena granditarsa, Forst. Thames Marshes ; not uncommon. 



Melanostoma ambiguum, Fin. Bexley, Farningham. 



Melanostoma mellinum, L. Generally distributed ; common. 



Melanostoma sealare, F. Generally distributed ; common. 



Melangyna quadrimaculata, Verr. Farningham. 



Leucozona lucorum, L. Bexley, Chislehurst. 



Didea fasciata, Mcq. Bexley. 



Catabomba pyrastri, L. Generally distributed. 



Catabomba selenitica, Mg. Eltham. 



Syrphus albostriatus, Fin. Eltham, Farningham. 



Syrphus tricinetus, Fin. Farningham, Bexley. 



Syrphus venustus, Mg. Eltham, Chislehurst. 



Syrphus torvus, O-S. Farningham. 



Syrphus ribesii, L. Generally distributed ; common. 



Syrphus vitripennis, Mg. Generally distributed ; common. 



Syrphus latifasciatus, Mcq. Eltham. 



Syrphus nitidicollis, Mg. Eltham, Bexley. 



Syrphus cor oil ae, F. Generally distributed ; common. 



Syrphus luniger, Mg. Generally distributed ; common. 



Syrphus bifasciatus, F. Generally distributed ; not uncommon. 



Syrphus balteatus, Deg. Generally distributed ; common. 



Syrphus cinctellus, Ztt. Chislehurst. 



Syrphus auricollis, Mg. Eltham, Bexley, Farningham. 



Syrphus umbellatarum, F. Abbey Wood Marshes (VerralL). 



Syrphus lasiopthalmus, Ztt. Bexley, Farningham, not uncommon. 



Syrphus barbifrons, Fin. Bexley, Sidcup. 



Sphaerophoria scripta, L. Generally distributed ; common. 



Sphaerophoria flavicauda, Ztt. Thames Marshes. 



Xanthogramma ornatum, Mg. Eltham. 



Xanthogramma citrofasciatum, Deg. Sidcup. 



Baccha obscuripennis, Mg. Bexley, Chelsfield. 



Ascia podagrica, F. Generally distributed ; common. 



Rhingia campestris, Mg. Generally distributed ; common. 



