C. clarinicollis is a common wasp .
Like all cuckoo wasps this species is also a parasite, and she finds her hosts in the bee hotel.
The larvae are cleptoparasites which means they feed of the provisions of the host larva.
3. PARASITIC RELATIONS
C. clarinicollis is a cleptoparasite on the following species:
|– Ancistrocerus oviventris |
– Ancistrocerus scoticus 
It is a small wasp 6 – 10 mm .
There are a number of cuckoo wasps that look similar .
The characteristics of the species are :
1. Head and thorax (mesosoma) metallic blue or violet with green reflections on pronotum and mesoscutellum
2. Tergites gold-red metallic
3. Sternites green or blue metallic
4. Black spots on sternite 2 rectangualar
5. Tergite 3 with clear teeth
6. Tergite 3 with 4 teeth
7. Back edge short, with shallow space between teeth
8. Middle teeth do not extend beyond lateral teeth
9. Abdome (metasoma) golden red color
10. Tergite 1 and 2 red
11. Tergite 3 red
12. Back edge tergite 3 same color as tergite
13. Abdomen broad and compact
14. Spurs hind tibia unequal in length
15. Length pronotum at least 1/4x width
16. First antenna flag (flagomere) segment with weak metallic shine
17. Frons with sparse, more erect hairs
18. Frontal carina without toothlike tubercles
19. Pronotum and mesoscutellum uniform greenish
20. Tergite 1 anteriorly and lateral blue-green, dorsally red
References1 Nederlands Soortenregister
3 Paukkunen J, Berg A, Soon V, Ødegaard F, Rosa P (2015) An illustrated key to the cuckoo wasps (Hymenoptera, Chrysididae) of the Nordic and Baltic countries, with description of a new species. ZooKeys 548: 1-116.