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Hi again I've had a look on-line for more info

http://www.fugleognatur.dk/gallery_browse.asp?ID=160323&ArtsID=15253&mode=art
Lispocephala alma - male (base of tarsomere 5 white)

http://www.fugleognatur.dk/gallery.asp?mode=ShowLarge&ID=160496
Lispocephala falculata - male (base of tarsomere 5 pale, same colour as other tarsomeres)

We have female falculata (on this site) and alma also appears to have the base of tarsomere 5 the same as tarsomere 4 (perhaps someone can confirm for sure)

If so we can discount it as a necessary feature

I also found this

It's a translation from the above Danish site as you can see the translator is not that good, if so alma is right


Hi Ole

It is Lispocephala alma (or falculata), she (Muscidae). Last link on the forefoot must be two-tone-mostly dark, but with light base. When the body is uniformly dark, one should be able to exclude, for example, l. falculata, where females have yellow base.

L. falculata can fly very early and earlier than alma, but already here in February after prolonged frost must be unusual ...

I am not quite sure that the two species females can be distinguished reliably, but I have followed Gregor et al. in the thread here -see the link HERE and certainly the female out from the color of the body. You can do the same.



Walther

It is a gender issue. At least according to The Muscidae (Diptera) of Central Europe by Gregor et al. (2002). I actually came a little in doubt after I had intended it to alma, if it is so safe to distinguish it from falculata-the female alone on color basalt on abdomen can occur. Gregor et al. makes it quite shown:
-Female abdomen dark, not yellow to base ... L. alma
-Female abdomen yellow to base ... L. falculata/l. ungulata (L. ungulata are a middelhavsart, so we must not worry about). So we follow key, it is l. alma, and I think we need to do!
Walther