Thread subject: Diptera.info :: Drosophilidae: Cacoxenus indagator? - yes

Posted by mammut on 17-04-2018 21:38
#1
This tiny fly (4-5 mm) visited several times a nesting site for bees (Osmia cornuta) situated on my balcony near Bologna, Italy. To me it looks like Cacoxenus indagator - is this the only possible species or are there other species with which it might be confused? Thanks for your help.
The pictures were taken on April 7, 2018.
Edited by mammut on 21-04-2018 22:02

Posted by mammut on 17-04-2018 21:40
#2
Photo 2

Posted by mammut on 17-04-2018 21:41
#3
photo 3

Posted by evdb on 17-04-2018 21:41
#4
No doubt for me but I am not a specialist

Posted by mammut on 17-04-2018 21:41
#5
photo 4

Posted by mammut on 17-04-2018 21:44
#6
photo 5 taken on April 8, 2018 but which should show the same species after a visit in one of the bee's nests

Posted by mammut on 18-04-2018 22:20
#7
Thank you Eugene !

Posted by Ectemnius on 20-04-2018 11:32
#8
Hello mammut,

There are several other species of Cacoxenus in Europe. No known from Italy, but that doesn't tell a lot. I can however count about twelve visible acrostical rows on the scutum in your photo's. That confirms it as Cacoxenus indagator Loew, 1858. The other four European species have ten rows at maximum.

Kind regards,

Ectemnius

Posted by mammut on 21-04-2018 22:01
#9
Thank you very much Ectemnius for your confirmation and the explanations!
kind regards
Mammut