THE DIPTERA OF THE BRISTOL DISTRICT. 
63 
Chilosia cyanocephala (Lw.) Batheaston (Blath vvayt). 
albipila (Mg.) V.R.P. 
Platychirus. Rather small, shining - hoverers, with yellow spots on 
abdomen. Male with broad front tarsi. I have bred them 
from Aphis-feeding larvae. 
Platychirus manicatus (Mg.) S.M. and Bitton, May to September. 
tarsalis (Schum.) Painswick (Wainwright), first record. 
discimanus (Lw.) V.R.P. 
peltatus (Mg.) Bitton, June. 
scutatus (Mg.) S.M. and Redland, common in June. 
albimanus (F.) Common throughout the district. 
scambus (Staeg.) V.R.P. 
fulviventris (Mcqp.) V.R.P. 
angustatus (Zett.) Minehead (Blathwayt) and V.R.P. 
Pyrophcena granditarsa (Forst.) Rare. S.M., August ; also V.R.P. 
Seen on flowers of Helosciadum in marshy spot. 
Mdauostoma ambignum (Fin.) Clifton Down, May. 
melinum (L.) Common throughout the district. 
scalare (F.) Common throughout the district. 
Leucozona leucorum (L.) S.M., May ; sometimes common. A beauti- 
ful fly, with base of abdomen white. 
Ischyroeyrphus glaucis (L.) Rare. Cheddar, August. The pale blue 
spots on the abdomen at once distinguish it. 
Didea fasciata (Mcq.) Minehead (Blathwayt). 
Catabomba pyrastri (L.) S.M. and Cheddar, common in July. 
,, selenitica (Mg.) Stroud (Wainwright). 
Syrphus. Medium sized beautiful hoverers ; black and yellow. 
Larvae are aphis-eaters and real friends to the gardener. 
Syrphus albostriatus (Fin.) S.M. and Bristol, August ; also V.R.P. 
tricinctus (Fin.) V.R.P. 
, , venustus (Mg.) Freshford, May, and V.R.P. 
lunulatus (Mg.) Freshford and Cheddar, September, V.R.P. 
lasiopthalmus (Zett.) Freshford and Leigh Woods, April. 
anmdatus (Zett.) Minehead (Blathwayt), Stroud (Wain- 
wright). 
annulipes (Zett.) Stroud (Wainwright), 1894, first record 
in Great Britain. 
grossularia (Mg.) Batheaston (Blathwayt) and V.R.P. 
ribesii (L.) Common everywhere. 
vitripennis (Mg.) S.M. and Bristol, not rare in August. 
latifasciatus (Mcq.) S.M. and Leigh Woods, August. 
nitidicollis (Mg.) Leigh Woods, May to August. 
nitens (Zett.) V.R.P. 
arcuatus (Fin.) Painswick (H.J.C.) 
corolla* (F.) 
luniger (Mg.) 
,, bifasciatus (F.) 
balteatus (Deg.) 
