Thread subject: Diptera.info :: Calliphora vomitoria? (01.08.18) --> Onesia austriaca

Posted by johnes81 on 03-08-2018 22:23
#7

Hello Jürgen,

you do a great job of documening the nature around you. You find many insects and spiders and i can confirm that it isn't easy getting shots (or photos) of them at times. You do well, my friend |t

lately i am not sleeping well and the weather is very hot (as you know). My arm is hurting for some reason. Anyway, i hate typing. I've always hated typing on a keyboard. Sometimes i post incomplete thoughts. I just noticed my sloppy post here, so i want to take a moment to correct some data: i meant to explain that the lack of a presutural ia indicates O. floralis. However, the fly in your photo is very damaged and many bristles are missing. I cannot key it properly with such damage. But i have learned alot about Onesia the past two years. I remember the strikingly obvious golden yellow hairs on the back of the head the very first time that i examined O. austriaca under the microscope. In fact, i told my wife verbatim "i am worried that i will misidentify O. austriaca as Calliphora vomitoria in a photo". The amount of golden yellow hairs seems to be much greater than that of O. floralis. I have not tested enough specimens to deem this as reliable but so far all of my specimens with such an amount of obvious golden yellow hairs have turned out to be O. austriaca. The very dark form had less golden yellow hairs but this may be due to maturity. I will keep testing this with O. floralis.

I believe you when you say that Onesia are not abundant in your area. I know that you cover nature well where you live.

I hope that you have a pleasant night,
John