Thread subject: Diptera.info :: Chrysotoxum cautum?

Posted by Jann Wuebbenhorst on 20-05-2017 16:03
#1
This Chrysotoxum was observed on 19-05-17 on gardenland within a hedge of Acer campestre an Crataegus sp.
(Northern Germany, Lower Saxony). Can the species be determined?
best wishes, Jann

Posted by Dukegraffio on 21-05-2017 10:16
#2
Female: unique among European Chrysotoxum in possessing a longitudinal, median, membranous strip on abdominal tergite 6, which effectively divides this tergite into two parts TumbsUp

Posted by Jann Wuebbenhorst on 21-05-2017 17:28
#3
Thank you very much for the information! Smile

Posted by treebeard on 21-05-2017 19:22
#4
I think that usually the patern of yellow markings on tergites is very distinctive ina case of Ch, cautum. The same as we can see on your picture. My English is not good enough to describe it, but I agree with your ID Smile

Posted by Jann Wuebbenhorst on 27-05-2017 13:01
#5
Tank you also, treebeard!
Do you think that the following two (photo taken on 07-07-16 in a village nearby) are also C. cautum?