THE DIPTERA OF THE BRISTOL DISTRICT. 
73 
Sapromyzim: — 
Sapromyza lupidina (F.) V.R.P. 
decempunctata (Fin.) S.M., July ; Horfield, June. 
pallidiventris (Fin.) V.R.P. 
litnra (Curt.) Nailsea, August. Very rare. 
rorida (Fin.) V.R.P. 
prceusta (Fin.) Nailsea, June, and V.R.P. 
Lauxania cylindr icon lis (F.) V.R.P. 
cenea (Mg\) V.R.P. 
Opomyzid^ — 
Balioptera combinata (L.) V.R.P. 
Opomyza germinationis (L.) Bristol and Cheddar. 
Sepsid^e — Little black flies, mostly with a spot at the tip of the 
wing - . 
Sepsis punctum (F.) V.R.P. 
,, cynipsea (L.) Common everywhere. I have seen thousands 
in a spot a few yards square, resting on foliage ; when 
disturbed they would rise in a cloud, and alight again in 
the same place. 
JSemopoda cylindrica (F.) Redland, June, and V.R.P. 
stercorea (Dsv.) S.M. Very common. 
Themira putris (L.) Redland, May. 
,, leachii (Mg.) S.M., August. 
Saltella scutellaris (Fin.) Langport, Dale. 
Piophila casei (L.) 'The Cheese fly.' Bristol, S.M., &c. 
Ephydrid^e — Small, mostly grey flies, generally found near water. 
Ilythea spilota (Hal.) S.M. in winter. A tiny fly with the wings so 
thickly spotted as to appear almost black. 
Tichomyza fusca (Mcq.) Keynsham, July. 
Notiphila guttiventris (Stn.) Bristol and Bitton, June. 
cinerea (Fin.) Bitton, June. 
Discocerina nigrina (Stn.) S.M., June. 
Hydrellia griseola (Fin.) S.M., July. 
hydrocotyles (Hal.) S.M., March. The larva is said to live 
and pupate in fronds of duck-weed {Lemnay 
Scatella sorbilldns (Hal.) S.M., July. 
,, noctulaiMg.) S.M., July. 
These two species are to be found running on the surface of a 
pond. 
Drosoph ilid^e — 
Drosophila funebris (F.) Redland, August. 
,, coiifusa (Staeg'J S.M., February. 
