Posted by colinleb on 23-08-2021 16:27
#1
Is this fungus-infected fly 
Chorisops tibialis please?  UK.  21 August 2021.
 
Posted by Zeegers on 23-08-2021 17:26
#2
It is a Chorisops and it looks like a male. It is very yellow for tibialis male …
Theo
 
Posted by colinleb on 23-08-2021 18:27
#3
Thank you Theo.  I am using the key in 
British Soldierflies 2nd edn by Stubbs and Drake and distinction between 
C. tibialis and 
C. nagatomii seems to be difficult?  I have tried to compare specimen with the figures for terminalia in Speight's 1981 paper in the 
Irish Nationalists Journal, Vo 20 No 8.  but without coming to a conclusion.  I post here views of the specimen but not sure they help much?