Thread subject: Diptera.info :: ->Anthomyiidea:Eustalomyia on old tree
Posted by nick upton on 11-10-2014 14:17
#1
A large grey/black tachinid wandering around on an old rotting tree base, inspecting a digger wasp (Ectemnius cephalotes) burrow repeatedly… though if my suggested ID Triarthria setipennis (the only species in the genus I can find records for in the UK), it was probably looking for its host the European earwig.. So they didn't all go for moth larvae… Thanks to JeremyR for suggesting Triarthria as a likely deadwood specialist if this is the right genus at least.
c15mm on fungal infected tree, Wickwar, Gloucestershire, UK 10.10.2014
Edited by nick upton on 11-10-2014 14:28
Posted by nick upton on 11-10-2014 14:18
#2
Head on view
Posted by nick upton on 11-10-2014 14:18
#3
Dorsal view
Posted by jeremyr on 11-10-2014 14:20
#4
it's Eustalomyia cf. festiva an Anthomyiid that goes after those black crabronid wasps, and some Ectemnius as well I think
you need a specimen to separate it from E histrio I think but it's probably festiva
Jeremy
Edited by jeremyr on 11-10-2014 14:23
Posted by nick upton on 11-10-2014 14:27
#5
OK many thanks. Bristly fly sniffing out burrows made me assume Tachinidae. Must do better!
Posted by nick upton on 11-10-2014 14:48
#6
Looks like Eustalomyia festiva is a regular parasite of Ectemnius cephalotes according to this BWARS link: http://www.bwars.com/index.php?q=wasp/crabronidae/crabroninae/ectemnius-cephalotes