Chrysis.net Forum

thanks Paolo!

I'll see if I can make a post with more pictures.

cheers,
Nick

:welcome: Nick! Well your ID is correct, I can't say anything else. Usually the smallest specimens belong to H. niemelai , but occasionally also gerstaeckeri males are small. The question on hairs is only for sex ID, if they are erected, then they are males (nobile, niemelai, gerstaeckeri ...

... just last week (7/2021) in Rhenen, the Netherlands and we got as far as Hedychrum nobile/niemelai for the colourful one. We are now wondering about the smaller one, it could be a male ...

Alex Berg if I have one with black hairs, does that mean it's nobile/niemelai or that I have a male of either n/n or gerstaeckeri? thanks a lot!

Nick W

Hello, I've read in the key of '"Hedychrum of Poland "(2015 Bogdan Wiśniowski) that the colour of mandibules ... male) - Mandibles black or darkened, without yellow patch medially ( nobile - niemelai male) https://www.researchgate.net/publication/284722927_Hedychrum_of_Poland_Hymenoptera_Chrysididae#:~:text=The%20most%20commonly%20recorded%20of%20all%20representatives%20of,Head%20in%20full-face%20view%20wider%20than%20its%20height ...

... But the colorouring (very green) seems a bit 'off'' for the H. nobile/niemelai/gerstacki options. And I have recently found out (thanks to Alex) that Holypyga is also sometimes an option. I find it hard to distinguish Hedychrum and Holopyga. Location: The Netherlands, southern part Size: rather ...

I assume it is the 'ususal'suspect: H.nobile/niemelai or gerstacki. I think there are no other possibilities in The Netherlands, regarding Hedychrum species. But the rather square 'cheek'/ angle of the cheek (rather triangular shape) seems ...

Thank you Alex, I'll take notice of the black hairs in the future.

Yes, looks like male and female of either nobile or niemelai, but I suppose the "male" could also be either sex of gerstaeckeri, it's hard to tell what sex it is as its not possible to make out if it has black hairs on not on the head

... and other wasps like Smicromyrme rufipes). The female H. nobile/niemelai was also spotted here. But I'm in doubt about the H. nobile/niemelai 'male'. It could also be another Hedychrum species. I spotted several species of Chrysididae on the sandy hill, going ...