Posted by David Gibbs on 23-07-2008 13:40
#7
jorgemotalmeida wrote:
what is the difference between Dischitus and SYstoechus? I suppose that the former is very whitish with a milky appearance?? And with a longer proboscis. Is it right?
Dischitus- head broader, laterotergite bare, r-m well beyond m-cu
Systoechus- head nattower than thorax, laterotergite haired, r-m and m-cu at same level.
biro and
senex are pale grey species, the common
Systoechus is a yellow fly (usually-they can fade)