Chrysis.net Forum

... can download this volume, Morgan (1984): http://www.royensoc.co.uk/sites/default ... Part05.pdf but in UK there are only few species. For nobile-niemelai identification you can check this post: viewtopic.php?f=8&t=1597&p=2484&hilit=nobile#p2484 Check the shape of the last sternite, ...

... specimens by photos. The only way is that you collect more female specimens and examine the shape of the last sternite. Often H. nobile and H. niemelai fly together in the same site. Therefore you should collect more specimens. In my experience, the larger specimens are always only H. nobile ...

Hello,

Yesterday I found some chrysidids within a Cerceris arenaria colony. After some research I think it should be Hedychrum nobile or H. niemelai. However, I can't find what the differences are to distinguish both species. So it would be great if someone could help me with that.

David

Jeroen!

You're absolutely right. It is not possible to ID this male specimen from the picture.

My personal feeling (based on the robust habitus) is that could be H. nobile, but this ID is not confirmed.

Cheers
Paolo

I fear that there is no way to be sure of which one this was. But you're the experts.
Anyone?

It was photographed in the Netherlands (Nijmegen) on June 20.

Thanks!
Jeroen

... dives Dahlbom, 1854; C. pumila Klug, 1845; C. succincta Linnaeus, 1767; Hedychrum bidentulum Lepeletier, 1806. The lectotypes of twenty-four species ... considered nomina oblita . Hedychrum rutilans Dahlbom, 1854, and He. niemelai Linsenmaier, 1959, are retained as nomina protecta . The first available ...

... = appear) + ( ba [RUS, nn.] = soul) [f.] Hedychreides (derivated from Hedychrum ) [m.] Hedychridium (derivated from Hedychrum ). Comment: we are ... of steel) gerstaeckeri (dedicated to Karl Eduard Adolph Gerstaecker) niemelai (dedicated to Paavo Niemelä) nobile (from nobilis, e [LAT, adj.] ...

... much for this information! Of course Halictus could not be the host of Hedychrum spp. It was only a very old citation. On the other hand, Cerceris spp. are well known as hosts of different Hedychrum : nobile , niemelai and gerstaeckeri . This is not a scientifical evidence, but it is ...

In that case its very likely H. nobile, as I dont think H. niemelai gets that big.

Same as with the other female that was posted: Its a female of either Hedychrum nobile or H. niemelai, the character used to separate the species is the medial flange on the 3rd sternite, ...