Trichrysis cyanea The Netherlands (Linnaeus,1758)

[pietsje]

Yesterday in my garden on an insecthotel, The Netherlands, southern part. I presume it is Trichrysis cyanea, because what could it be otherwise. I don't think it is T. indigotea (it misses the dark blue on the back and it is not known from my garden). But just to be sure. Am I correct? It was about 6-7mm.

[Alex]

The tridentate apical tergum is unique to the genus Trichrysis, atleast in northern/middle europe, which removes C. iris, Spinolia unicolor and other blue-green chrysidids. The most common species is the ubiquitous T. cyanea, but there are more species in the genus outside northern europe, I'm not sure if there's any congeners in the Netherlands - likely not?

/A

[pietsje]

Thanks for your reply Alex! The only other possibility for the Netherlands seems C. indigotea. And I don't think that is the case. So thanks for your confirmation.

[Alex]

C. indigotea always have four abdominal teeth, while this specimen obviously have three, so I guess thats a confirmation

[pietsje]

Thanks Alex!