Chrysis.net Forum

Yesterday 31/5/2013, The Netherlands, my garden, I had two specimen, but they looked different. Is it correct to assume that they are two different species: Pseudommalus violaceus and... second photo ?
Kind regards,
Pietsje

A suggestion was made on the Dutch forum by Theo Peeters: Omalus biaccinctus. Could that be correct?
Today, 2/6 I saw it again. I could make a photo, but it was very fast.

I was completely wrong in my assumtion that is was my 'ususal' P. violaceus (I saw it 3 years in a row). This is the reply from Alex on hymis.de (Thanks Alex !!!!!):
"Saw your photographs on Chrysis.net as well, its hard to say from the photographs, the scutal punctuation is very important when ID'ing Omalus and relatives.
3 & 5 is Omalus biaccinctus, as the scutum is shining and totally without punctures, but "rippled" in a wave like manner. It is not P. violaceus as that species have obvious punctures on the scutum, at least posteriorally between the notauli, and a much more pronounced cavitas frontalis.

The other wasp looks much more punctured on the scutum, and as such would likely be a Pseudomalus sp.

/Alex

EDIT: About the colours, O. biaccinctus and the other "two coloured" species, the abdomen colour varies a lot, both between individuals but even more so depending on the viewing angle and lighting."

The discussion wasn't over, see here: http://www.forum.hymis.de/viewtopic.php?f=14&t=10897