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Brassicaria is very hard to tell from brevicornis in pictures.
In females, you can assess the number of marginal bristles on the fourth (apperent third) segment): 4 in brassicaria, 6 in brevicornis. In brassicaria, the strict laterals are lacking, as well shown in the first pic. So brassicaria it is.

There has been a serious influx of C. brassicaria in NL and B this summer, soon to be published in Nederlandse Faunistische Mededelingen.


Theo