---

Paul, can I take it by the position of a comma after "Well" in the above statement that this is D.femoratus? Exclusion of the comma would put stress on the word "is", which would imply that this is a Dilophus sp. which you do not know.
English Language can lead to simple answers sounding either condescending at worst, or rather ambiguous, intended or otherwise.
Clarification would be appreciated. B).

Regards Roger