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Diptera.info :: Identification queries :: Other insects, spiders, etc.
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Chrysolina americana - rosemary beetle
Paul Beuk
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Posted on 03-10-2006 20:35
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Location: Netherlands
Posts: 19403
Joined: 11.05.04

Sometimes you just stumble on something nice and conspicuous. This time, last Sunday, it was in my own front garden.
We have two rosemary bushes there. Rosemary is not indigenous to the Netherlands, so anything specializing on such a plant is potentially interesting. If you then find some beautiful chrysomelids on the plant, you collect a few and try to find out what they are. You end up with Chrysolina americana, the rosemary beetle. Five known localities in the Netherlands (http://home.zonne...m#CHLIAMER), with only one comfirmed breeding population (Tilburg). Conspicuously enough, my own city, Hoorn, had one recorded specimen, collected indoors. It is marked as 'doubtful, antropogeneous'. My records show that it might not have been en incident that it was recorded there earlier.

Here are two pictures I took today.
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Paul Beuk
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Posted on 03-10-2006 20:35
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Location: Netherlands
Posts: 19403
Joined: 11.05.04

Second one.
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Tony Irwin
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Posted on 03-10-2006 22:00
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Location: Norwich, England
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Very pretty. Highly destructive. They've been in Norfolk for about four years, and are common in Norwich, both on Rosmarius and Lavendula. Although called Chrysolina americana, I understand it is native to the Mediterranean area. Like the Asian Harlequin Ladybird, I think it's here to stay.
Tony
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Tony Irwin
 
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08.09.25 16:17
Anyone has this article'A REVISION OF SPECIES OF THE GENUS CADREMA WALKER (DIPTERA, CHLOROPIDAE) FROM ISLANDS IN THE INDIAN OCEAN'? Smile

24.08.25 16:55
Thanks for your proposal, but for me this option is ineligible.

15.08.25 10:15
For those specialists not active on Facebook, I just ask to consider to join our group on FB. Please, be aware that it is not necessary at all to be active on FB outside the diptera group. Actually, n

15.08.25 10:13
We received requests to get permission to ask for ID in our Facebook group, https://www.facebo
ok.com/groups/1798
95332035235/ Until now we pointed to diptera.info, but since Paul's passing we not

23.06.25 18:10
If you have some spare money, there is a copy (together with keys to pupae and larvae) for sale by Hermann L. Strack, Loguivy Plougras, France

23.06.25 11:18
Appreciate it, Tony Irwin! I got the hint to use the key next to Langton and Pinder key for females of Chironomidae. So no specific queries, except the keys... I will keep this on my list and hope th

19.06.25 15:33
I have the hard copy book, if you have any specific queries, but I'm not scanning the 500+ pages!

02.06.25 18:26
Anyone has "Chironomidae of the Holarctic region. Keys and diagnoses. Part 3. Adult Males Entomologica Scandinavica Supplement 34"? smolwaarneming@gma
il.com

28.05.25 20:57
I have Russian Coenosia. nikita6510@ya.ru

28.05.25 12:25
Is someone able to share with me "A key to the Russian species of the genus Coenosia"?

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